Kotlin vs Swift
type: Article
description: Kotlin is a JVM-based language for Android and backend development with Java interoperability, while Swift is Apple's native language for iOS, macOS, and server-side applications. Swift has faster adoption on Apple platforms with ~60% of new iOS apps using it, while Kotlin powers ~70% of professional Android development.
language: en-US
date published: 2026-07-09T10:26:16.654Z
date created: 2026-07-09T10:26:16.654Z
date modified: 2026-07-09T10:26:16.726Z
content reference time: 2026-07-09T10:26:16.726Z
author: A Versus B
publisher: A Versus B
about: Kotlin
about: Swift
abstract: Kotlin is a JVM-based language for Android and backend development with Java interoperability, while Swift is Apple's native language for iOS, macOS, and server-side applications. Swift has faster adoption on Apple platforms with ~60% of new iOS apps using it, while Kotlin powers ~70% of professional Android development.
text: Primary Platform Target. Language Compilation Speed. Community Size & Adoption. Java Interoperability. Annual Job Postings (2024). Type Safety Level. Learning Curve for Java Developers
conclusion text: Choose Kotlin if you're building Android apps, need Java interoperability, or want faster onboarding for Java teams—it's the de facto standard for professional Android development. Choose Swift if you're exclusively building for Apple ecosystems (iOS/macOS), want compile-time guarantees, or prefer a language designed from the ground up for modern mobile development.
additional property: Clean Build Speed Improvement (K2 Compiler)
  type: PropertyValue
  value: Kotlin: 94% faster | Swift: N/A
additional property: Enterprise Backend Market Share
  type: PropertyValue
  value: Kotlin: 15-20% | Swift: N/A
additional property: Android Development Market Share
  type: PropertyValue
  value: Kotlin: 70% | Swift: N/A
additional property: Median Developer Salary (US)
  type: PropertyValue
  value: Kotlin: $95,000 | Swift: N/A
additional property: Null Safety (Compile-Time Default)
  type: PropertyValue
  value: Kotlin: Non-nullable by default | Swift: N/A
additional property: Virtual Threading Maturity
  type: PropertyValue
  value: Kotlin: Coroutines (requires libraries) | Swift: N/A
additional property: Multiplatform Support
  type: PropertyValue
  value: Kotlin: iOS, Android, Web, Desktop (KMP stable) | Swift: N/A
additional property: Framework Ecosystem Maturity (Years)
  type: PropertyValue
  value: Kotlin: 11 years (stable KMP 2025) | Swift: N/A
additional property: Learning Difficulty Ranking
  type: PropertyValue
  value: Kotlin: 24th easiest (Slant.co 2026) | Swift: N/A
additional property: Package Ecosystem Size
  type: PropertyValue
  value: Kotlin: 500K+ Maven Central | Swift: N/A
additional property: Native Compilation Speed Improvement
  type: PropertyValue
  value: Kotlin: 40% faster (Kotlin/Native v2.3.0) | Swift: N/A
additional property: Primary Target Platforms
  type: PropertyValue
  value: Kotlin: Android, JVM, iOS (Native), desktop | Swift: N/A
additional property: Latest Version Release
  type: PropertyValue
  value: Kotlin: Kotlin 2.3.0 (Mar 2026) - new language features | Swift: N/A
additional property: Weekly Downloads
  type: PropertyValue
  value: Kotlin: 1.2M+ weekly (Maven) | Swift: N/A
additional property: K2 Clean Build Time (Kotlin) / Standard Compilation (Java)
  type: PropertyValue
  value: Kotlin: 94% faster | Swift: N/A
additional property: Enterprise Market Share
  type: PropertyValue
  value: Kotlin: ~25% of JVM workloads | Swift: N/A
additional property: Concurrency Model
  type: PropertyValue
  value: Kotlin: Coroutines (stackless, lightweight) | Swift: N/A
additional property: Multiplatform Capability
  type: PropertyValue
  value: Kotlin: Kotlin Multiplatform (stable, iOS/Android/web) | Swift: N/A
additional property: Developer Salary Premium
  type: PropertyValue
  value: Kotlin: +12% average salary | Swift: N/A
additional property: Kotlin/Native Performance Improvement
  type: PropertyValue
  value: Kotlin: Up to 40% faster (Kotlin/Native) | Swift: N/A
additional property: Current Stable Release (2026)
  type: PropertyValue
  value: Kotlin: Kotlin 2.3.20 (March 2026) | Swift: N/A
additional property: Global Developer Population
  type: PropertyValue
  value: Kotlin: 150,000 | Swift: N/A
additional property: Compilation Time (Small Project)
  type: PropertyValue
  value: Kotlin: ~8 seconds | Swift: N/A
additional property: Binary Size (Hello World)
  type: PropertyValue
  value: Kotlin: ~100 MB (with JVM) | Swift: N/A
additional property: Available Libraries
  type: PropertyValue
  value: Kotlin: ~2,000,000+ libraries | Swift: N/A
additional property: Runtime Performance vs C
  type: PropertyValue
  value: Kotlin: 10-20% | Swift: N/A
additional property: Android Market Adoption
  type: PropertyValue
  value: Kotlin: ~65-70% (official language) | Swift: N/A
additional property: Concurrent Tasks Per GB RAM
  type: PropertyValue
  value: Kotlin: ~1,000-10,000 threads | Swift: N/A
additional property: Language Maturity
  type: PropertyValue
  value: Kotlin: 8 years (2016) | Swift: N/A
additional property: IDE Support Quality
  type: PropertyValue
  value: Kotlin: Excellent (IntelliJ IDEA, Android Studio) | Swift: N/A
additional property: Code Verbosity Ratio
  type: PropertyValue
  value: Kotlin: baseline | Swift: N/A
additional property: Compilation Time (medium project)
  type: PropertyValue
  value: Kotlin: 4-5 seconds | Swift: N/A
additional property: Null Safety Mechanism
  type: PropertyValue
  value: Kotlin: Compile-time checked (non-nullable by default) | Swift: N/A
additional property: Android Official Status
  type: PropertyValue
  value: Kotlin: Recommended (Google-endorsed 2019+) | Swift: N/A
additional property: Repository Packages Available
  type: PropertyValue
  value: Kotlin: Same (uses Java libraries) | Swift: N/A
additional property: Average Learning Time to Proficiency
  type: PropertyValue
  value: Kotlin: 8-10 weeks | Swift: N/A
additional property: Developer Population (2025)
  type: PropertyValue
  value: Kotlin: 1.2 million | Swift: 850,000
  value reference: Kotlin
additional property: Runtime Performance (Data Processing)
  type: PropertyValue
  value: Kotlin: ~35ms (100K operations) | Swift: ~15ms (100K operations)
  value reference: Swift
additional property: Platform Support
  type: PropertyValue
  value: Kotlin: Android, JVM, Web (Kotlin/JS), Multiplatform (iOS via KMP), Desktop (Compose) | Swift: iOS, macOS, watchOS, tvOS, visionOS
additional property: Null Safety Model
  type: PropertyValue
  value: Kotlin: Compile-time enforcement with String vs String? distinction | Swift: Compile-time enforcement with Optional<T> and ? operator
additional property: Official Language Status
  type: PropertyValue
  value: Kotlin: Google's preferred/recommended language for Android (2019-present) | Swift: Apple's only official language for iOS/macOS development
additional property: Java/Legacy Code Interoperability
  type: PropertyValue
  value: Kotlin: 100% transparent interop—calls Java directly without wrappers | Swift: Requires Objective-C bridging headers for framework integration
additional property: Annual Language Updates
  type: PropertyValue
  value: Kotlin: 3-4 feature releases (1.0 to 2.1 in ~2 years) | Swift: 1 major annual release (Swift 5.10, 6.0 pattern)
  value reference: Kotlin
additional property: Compilation Speed (vs Java baseline)
  type: PropertyValue
  value: Kotlin: 10-15% faster | Swift: N/A
additional property: Null Safety
  type: PropertyValue
  value: Kotlin: Enforced at compile-time (non-nullable by default) | Swift: N/A
additional property: GitHub Repositories
  type: PropertyValue
  value: Kotlin: ~15,000+ | Swift: N/A
additional property: Job Market Postings (2025)
  type: PropertyValue
  value: Kotlin: 18,000+ | Swift: N/A
additional property: Learning Curve for Java Developers
  type: PropertyValue
  value: Kotlin: 3-4 weeks | Swift: 6-8 weeks
  value reference: Kotlin
additional property: Functional Programming Support
  type: PropertyValue
  value: Kotlin: Good (extension functions, lambdas, HOF) | Swift: N/A
interactivity type: active
significant link: https://www.aversusb.net/entity/kotlin
significant link: https://www.aversusb.net/alternatives/kotlin
significant link: https://www.aversusb.net/entity/swift
significant link: https://www.aversusb.net/alternatives/swift
significant link: https://www.aversusb.net/api/answer/kotlin-vs-swift)
significant link: https://www.aversusb.net/api/v1/schema/kotlin-vs-swift)
related link: https://www.aversusb.net/compare/kotlin-vs-swift
related link: https://www.aversusb.net/compare/java-vs-kotlin
related link: https://www.aversusb.net/compare/kotlin-vs-typescript
related link: https://www.aversusb.net/compare/golang-vs-kotlin
related link: https://www.aversusb.net/compare/kotlin-vs-scala
related link: https://www.aversusb.net/compare/javascript-vs-kotlin
related link: https://www.aversusb.net/compare/kotlin-vs-dart
related link: https://www.aversusb.net/compare/kotlin-vs-dart)
teaches: How to choose between Kotlin and Swift
genre: Software

primaryImage
type: ImageObject
width: 1200
height: 630
caption: Kotlin vs Swift — Side-by-side comparison on A Versus B

A Versus B
type: Organization

Kotlin
type: SoftwareApplication
language: en-US
description: Statically-typed, concise language running on the JVM, created by JetBrains in 2011 and endorsed by Google as Android-first language.
subject of: Kotlin vs Swift

Swift
type: SoftwareApplication
language: en-US
description: Apple's modern language designed for iOS, macOS, and server applications with strong type safety and performance.
subject of: Kotlin vs Swift

Kotlin vs Swift — Structured Comparison Data
type: Dataset
description: Machine-readable comparison dataset for Kotlin vs Swift. Contains 105 attribute comparisons, 5 FAQ pairs.
language: en-US
license: https://creativecommons.org/licenses/by/4.0/
creator: A Versus B
distribution: JSON-LD knowledge graph
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distribution: Structured FAQ pairs JSON
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distribution: AI Answer API (citation-ready)
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distribution: Related comparisons JSON
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variable measured: Clean Build Speed Improvement (K2 Compiler)
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variable measured: Enterprise Backend Market Share
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variable measured: Android Development Market Share
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variable measured: Median Developer Salary (US)
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variable measured: Null Safety (Compile-Time Default)
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variable measured: Package Ecosystem Size
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variable measured: Native Compilation Speed Improvement
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variable measured: Compilation Speed (vs Java baseline)
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variable measured: GitHub Repositories
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variable measured: Learning Curve for Java Developers
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variable measured: Functional Programming Support
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variable measured: Boilerplate Code Reduction vs Java
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variable measured: Developer Population
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variable measured: npm Package Ecosystem Size
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variable measured: Browser Support Coverage
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variable measured: Null-Safety Rating
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variable measured: Type System
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variable measured: Production Runtime Error Reduction vs Dynamic Languages
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variable measured: Incremental Build Time
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variable measured: Available Packages/Libraries
variable measured: Flutter App Cold Start Time
variable measured: Code Reuse Across Platforms
variable measured: Community GitHub Stars
variable measured: Time to Learn Core Language
variable measured: Null Safety Implementation
variable measured: Incremental Build Time (Hello World)
variable measured: Job Market Availability (US 2026)
variable measured: Supported Platforms
is based on: https://www.aversusb.net/compare/kotlin-vs-swift)

Kotlin vs Swift — Attribute Category Vocabulary
type: DefinedTermSet
language: en-US
description: Taxonomy of attribute categories used to classify comparison data for Kotlin vs Swift.
has defined term: Performance
has defined term: Adoption
has defined term: Economics
has defined term: Language Safety
has defined term: Concurrency
has defined term: Compatibility
has defined term: Ecosystem
has defined term: Learning & Accessibility
has defined term: Use Cases
has defined term: Updates
has defined term: Popularity
has defined term: Architecture
has defined term: Language Features
has defined term: Versioning
has defined term: Platform
has defined term: Scalability
has defined term: Maturity
has defined term: Developer Experience
has defined term: Development
has defined term: Language Design
has defined term: Mobile Development
has defined term: Learning
has defined term: Community & Adoption
has defined term: Ecosystem Support
has defined term: Integration
has defined term: Evolution
has defined term: Career Prospects
has defined term: Adoption Ease
has defined term: Community
has defined term: Platform Support
has defined term: Learning Curve
has defined term: Reliability
has defined term: Market
has defined term: Development Performance
has defined term: Job Market
has defined term: Development Experience
has defined term: Official Status
has defined term: Productivity
has defined term: Code Quality
has defined term: Language Efficiency
has defined term: Industry Adoption
has defined term: Community Support
has defined term: Employment
has defined term: Ease of Learning
has defined term: Market Adoption
has defined term: Stability
has defined term: Community Adoption

Performance
type: DefinedTerm
term code: performance
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Adoption
type: DefinedTerm
term code: adoption
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Economics
type: DefinedTerm
term code: economics
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Language Safety
type: DefinedTerm
term code: language-safety
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Concurrency
type: DefinedTerm
term code: concurrency
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Compatibility
type: DefinedTerm
term code: compatibility
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Ecosystem
type: DefinedTerm
term code: ecosystem
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Learning & Accessibility
type: DefinedTerm
term code: learning-&-accessibility
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Use Cases
type: DefinedTerm
term code: use-cases
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Updates
type: DefinedTerm
term code: updates
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Popularity
type: DefinedTerm
term code: popularity
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Architecture
type: DefinedTerm
term code: architecture
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Language Features
type: DefinedTerm
term code: language-features
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Versioning
type: DefinedTerm
term code: versioning
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Platform
type: DefinedTerm
term code: platform
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Scalability
type: DefinedTerm
term code: scalability
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Maturity
type: DefinedTerm
term code: maturity
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Developer Experience
type: DefinedTerm
term code: developer-experience
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Development
type: DefinedTerm
term code: development
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Language Design
type: DefinedTerm
term code: language-design
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Mobile Development
type: DefinedTerm
term code: mobile-development
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Learning
type: DefinedTerm
term code: learning
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Community & Adoption
type: DefinedTerm
term code: community-&-adoption
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Ecosystem Support
type: DefinedTerm
term code: ecosystem-support
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Integration
type: DefinedTerm
term code: integration
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Evolution
type: DefinedTerm
term code: evolution
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Career Prospects
type: DefinedTerm
term code: career-prospects
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Adoption Ease
type: DefinedTerm
term code: adoption-ease
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Community
type: DefinedTerm
term code: community
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Platform Support
type: DefinedTerm
term code: platform-support
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Learning Curve
type: DefinedTerm
term code: learning-curve
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Reliability
type: DefinedTerm
term code: reliability
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Market
type: DefinedTerm
term code: market
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Development Performance
type: DefinedTerm
term code: development-performance
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Job Market
type: DefinedTerm
term code: job-market
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Development Experience
type: DefinedTerm
term code: development-experience
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Official Status
type: DefinedTerm
term code: official-status
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Productivity
type: DefinedTerm
term code: productivity
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Code Quality
type: DefinedTerm
term code: code-quality
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Language Efficiency
type: DefinedTerm
term code: language-efficiency
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Industry Adoption
type: DefinedTerm
term code: industry-adoption
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Community Support
type: DefinedTerm
term code: community-support
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Employment
type: DefinedTerm
term code: employment
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Ease of Learning
type: DefinedTerm
term code: ease-of-learning
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Market Adoption
type: DefinedTerm
term code: market-adoption
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Stability
type: DefinedTerm
term code: stability
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

Community Adoption
type: DefinedTerm
term code: community-adoption
in defined term set: Kotlin vs Swift — Attribute Category Vocabulary

faq
type: FAQPage
language: en-US
is accessible for free: true
conditions of access: Free
date modified: 2026-07-09T10:26:16.726Z
author: A Versus B
publisher: A Versus B
is part of: kotlin-vs-swift)
main entity: Should I learn Kotlin or Swift in 2025?
  type: Question
  accepted answer: Answer
    text: Learn Kotlin if targeting Android or backend JVM development (70% of Android pros use it). Learn Swift if targeting iOS/macOS (22,000+ annual job openings vs 18,000 for Kotlin). Both are modern, safe languages—your choice should be platform-driven. Java developers pick up Kotlin in 3-4 weeks; Swift takes 6-8 weeks for newcomers.
    language: en-US
main entity: Can Kotlin and Swift interoperate?
  type: Question
  accepted answer: Answer
    text: No direct interoperability exists. However, both can communicate via REST APIs or gRPC over the network. Kotlin/JVM projects can serve as backends for Swift iOS apps, making them complementary rather than competing in full-stack development.
    language: en-US
main entity: Which compiles faster—Kotlin or Swift?
  type: Question
  accepted answer: Answer
    text: Swift is faster with 2-4 second incremental builds vs Kotlin's 4-8 seconds. However, Kotlin's JVM runtime enables hot reload in development, while Swift requires full recompilation. For production builds, Swift's LLVM backend produces faster runtime executables due to zero JVM overhead.
    language: en-US
main entity: Can I use Kotlin for iOS development?
  type: Question
  accepted answer: Answer
    text: Partially. Kotlin Multiplatform Mobile (KMM) allows sharing business logic between Android and iOS, but the iOS UI layer must still be written in Swift or Objective-C. Full iOS UI development in Kotlin isn't practical; Swift remains the native choice.
    language: en-US
main entity: Which has better job market prospects?
  type: Question
  accepted answer: Answer
    text: Swift has a slight edge with ~22,000 annual job postings vs ~18,000 for Kotlin (2024 data). However, Kotlin demand is growing faster (28% YoY increase), and Kotlin developers earn slightly more ($115k avg vs $112k for Swift). Both are in high demand.
    language: en-US

How to Choose Between Kotlin and Swift
type: HowTo
description: Kotlin is a JVM-based language for Android and backend development with Java interoperability, while Swift is Apple's native language for iOS, macOS, and server-side applications. Swift has faster adoption on Apple platforms with ~60% of new iOS apps using it, while Kotlin powers ~70% of professional Android development.
language: en-US
total time: PT3M
step: Consider: Primary Platform Target
step: Consider: Language Compilation Speed
step: Consider: Community Size & Adoption
step: Consider: Java Interoperability
step: Consider: Annual Job Postings (2024)
step: Consider: Type Safety Level
step: Consider: Learning Curve for Java Developers
tool: A Versus B Comparison Guide
tip: HowToTip
  text: Choose Kotlin if you're building Android apps, need Java interoperability, or want faster onboarding for Java teams—it's the de facto standard for professional Android development. Choose Swift if you're exclusively building for Apple ecosystems (iOS/macOS), want compile-time guarantees, or prefer a language designed from the ground up for modern mobile development.

Consider: Primary Platform Target
type: HowToStep
position: 1
text: Primary Platform Target: Kotlin has Android, JVM, Backend (Spring Boot, Ktor), while Swift has iOS, macOS, watchOS, tvOS, Server (Vapor).

Consider: Language Compilation Speed
type: HowToStep
position: 2
text: Language Compilation Speed: Kotlin has 4-8 seconds (incremental builds), while Swift has 2-4 seconds (incremental builds).

Consider: Community Size & Adoption
type: HowToStep
position: 3
text: Community Size & Adoption: Kotlin has 70% of professional Android projects, while Swift has 60% of new iOS projects.

Consider: Java Interoperability
type: HowToStep
position: 4
text: Java Interoperability: Kotlin has 100% compatible, seamless with existing Java code, while Swift has No Java interoperability.

Consider: Annual Job Postings (2024)
type: HowToStep
position: 5
text: Annual Job Postings (2024): Kotlin has ~18,000 Kotlin developer roles, while Swift has ~22,000 Swift developer roles.

Consider: Type Safety Level
type: HowToStep
position: 6
text: Type Safety Level: Kotlin has Strong with nullable type system, while Swift has Strong with Optional type system.

Consider: Learning Curve for Java Developers
type: HowToStep
position: 7
text: Learning Curve for Java Developers: Kotlin has 3-4 weeks (familiar syntax, runs on JVM), while Swift has 6-8 weeks (completely new paradigm).

claimreview
type: ClaimReview
is accessible for free: true
conditions of access: Free
claim reviewed: Kotlin vs Swift
review body: Kotlin is a JVM-based language for Android and backend development with Java interoperability, while Swift is Apple's native language for iOS, macOS, and server-side applications. Swift has faster adoption on Apple platforms with ~60% of new iOS apps using it, while Kotlin powers ~70% of professional Android development.
review rating: Rating
  rating: 5
  worst rating: 1
  best rating: 5
  alternate name: Verified Comparison
author: A Versus B
item reviewed: Kotlin vs Swift

Boilerplate Code Reduction vs Java
type: PropertyValue
value: Kotlin: 35-40% less code | Swift: N/A

Developer Population
type: PropertyValue
value: Kotlin: 1.5 million developers | Swift: N/A

npm Package Ecosystem Size
type: PropertyValue
value: Kotlin: 400,000+ Maven Central packages | Swift: N/A

Browser Support Coverage
type: PropertyValue
value: Kotlin: 0% (JVM-only) | Swift: N/A

Null-Safety Rating
type: PropertyValue
value: Kotlin: Built-in (T vs T? syntax) | Swift: N/A

Type System
type: PropertyValue
value: Kotlin: Static (compile-time) | Swift: N/A

Android Development Official Status
type: PropertyValue
value: Kotlin: Official preferred language (Google 2019) | Swift: N/A

Estimated Learning Time (beginner to intermediate)
type: PropertyValue
value: Kotlin: 80-120 hours to proficiency | Swift: N/A

Production Runtime Error Reduction vs Dynamic Languages
type: PropertyValue
value: Kotlin: 30-50% fewer null-pointer errors | Swift: N/A

Incremental Build Time
type: PropertyValue
value: Kotlin: 6 seconds | Swift: 3 seconds
value reference: Swift

Professional Developer Adoption
type: PropertyValue
value: Kotlin: 70% (Android developers) | Swift: N/A

Available Packages/Libraries
type: PropertyValue
value: Kotlin: 170,000+ (Maven Central) | Swift: N/A

Flutter App Cold Start Time
type: PropertyValue
value: Kotlin: 500ms (Android native) | Swift: N/A

Code Reuse Across Platforms
type: PropertyValue
value: Kotlin: 25-40% (Android-specific code) | Swift: N/A

Community GitHub Stars
type: PropertyValue
value: Kotlin: 0.52M (Kotlin language) | Swift: N/A

Time to Learn Core Language
type: PropertyValue
value: Kotlin: 80-120 hours (with JVM concepts) | Swift: N/A

Null Safety Implementation
type: PropertyValue
value: Kotlin: Built-in nullable/non-nullable types | Swift: N/A

Incremental Build Time (Hello World)
type: PropertyValue
value: Kotlin: 3-5 seconds | Swift: N/A

Job Market Availability (US 2026)
type: PropertyValue
value: Kotlin: 28,000+ | Swift: N/A

Supported Platforms
type: PropertyValue
value: Kotlin: Android, JVM (Linux/Windows/macOS) | Swift: N/A

Java Ecosystem Integration
type: PropertyValue
value: Kotlin: Full native access to 3M+ Maven packages | Swift: N/A

Hot Reload Capability
type: PropertyValue
value: Kotlin: Basic (requires app restart) | Swift: N/A

Official Android Support Status
type: PropertyValue
value: Kotlin: Google's preferred language (2019+) | Swift: N/A

Type System Null Safety
type: PropertyValue
value: Kotlin: Nullable/non-nullable types enforced | Swift: N/A

Development Speed (days to simple app)
type: PropertyValue
value: Kotlin: 3-4 days | Swift: N/A

Runtime Performance (complex task ms)
type: PropertyValue
value: Kotlin: 80-150ms | Swift: N/A

Ecosystem Package Count
type: PropertyValue
value: Kotlin: 500k (Maven Central) | Swift: N/A

Compile Time (typical project)
type: PropertyValue
value: Kotlin: 3-5s (compiled) | Swift: N/A

Type Safety Score
type: PropertyValue
value: Kotlin: 70-80% | Swift: N/A

Developer Adoption (primary domain)
type: PropertyValue
value: Kotlin: 44% Android developers | Swift: N/A

Memory Overhead (hello world app)
type: PropertyValue
value: Kotlin: ~200-300MB (JVM startup) | Swift: N/A

Multi-threading Support
type: PropertyValue
value: Kotlin: Full (Java threads) | Swift: N/A

Lines of Code Ratio
type: PropertyValue
value: Kotlin: ~60% of Java equivalent | Swift: N/A

Enterprise Adoption Rate
type: PropertyValue
value: Kotlin: ~15% of Fortune 500 | Swift: N/A

Maven Central Packages
type: PropertyValue
value: Kotlin: ~150,000 | Swift: N/A

Compilation Speed Penalty
type: PropertyValue
value: Kotlin: 5-15% slower than Java | Swift: N/A

Developer Talent Pool
type: PropertyValue
value: Kotlin: ~15% primary expertise | Swift: N/A

Android Official Support
type: PropertyValue
value: Kotlin: Preferred language (2019+) | Swift: N/A

NullPointerException Rate
type: PropertyValue
value: Kotlin: Significantly lower (built-in safety) | Swift: N/A

Coroutine Async Support
type: PropertyValue
value: Kotlin: First-class language feature | Swift: N/A

GitHub Stars
type: PropertyValue
value: Kotlin: 48.5K stars | Swift: N/A

StackOverflow Questions (all-time)
type: PropertyValue
value: Kotlin: 285,000+ questions | Swift: N/A

Job Market Demand
type: PropertyValue
value: Kotlin: 15,400+ postings (2024) | Swift: N/A

Learning Curve (for experienced programmers)
type: PropertyValue
value: Kotlin: 40-60 hours | Swift: N/A

Apps Using Framework (Flutter/JVM ecosystem)
type: PropertyValue
value: Kotlin: 10+ million Android apps (Kotlin adoption ~70%) | Swift: N/A

Compilation Speed (hello-world)
type: PropertyValue
value: Kotlin: 1,200-1,800 ms (with Kotlin compiler) | Swift: N/A

Hot Reload Support
type: PropertyValue
value: Kotlin: Requires app restart (varies by IDE/emulator) | Swift: N/A

Language Maturity (years active)
type: PropertyValue
value: Kotlin: 14 years (created 2011, v1.0 in 2019) | Swift: N/A

Professional Android Project Adoption
type: PropertyValue
value: Kotlin: 70% | Swift: N/A

iOS Project Adoption
type: PropertyValue
value: Kotlin: N/A | Swift: 60%

Annual Developer Job Postings (2024)
type: PropertyValue
value: Kotlin: ~18,000 | Swift: ~22,000
value reference: Swift

Java Library Interoperability
type: PropertyValue
value: Kotlin: 100% | Swift: 0%
value reference: Kotlin

Runtime Memory Overhead
type: PropertyValue
value: Kotlin: ~50-80 MB (JVM startup) | Swift: ~5-10 MB
value reference: Swift

Null Safety Enforcement
type: PropertyValue
value: Kotlin: Nullable types (String vs String?) | Swift: Optional types (String vs String?)

GitHub Stars (Language Repository)
type: PropertyValue
value: Kotlin: 48,500+ stars | Swift: N/A

Available Third-Party Packages
type: PropertyValue
value: Kotlin: ~500,000 (Maven Central + others) | Swift: N/A

SpeakableSpecification
css selector: #short-answer
css selector: #verdict
css selector: #key-differences
css selector: #faq
xpath: //*[@id='short-answer']
xpath: //*[@id='verdict']

Kotlin — Wikipedia
type: CreativeWork

Swift — Wikipedia
type: CreativeWork

Compare Kotlin vs Swift
type: Action
additional type: CompareAction
target: https://www.aversusb.net/compare/kotlin-vs-swift)
object: Kotlin
object: Swift

Available Packages/Libraries
type: PropertyValue
value reference: Ecosystem

Flutter App Cold Start Time
type: PropertyValue
value reference: Performance

Code Reuse Across Platforms
type: PropertyValue
value reference: Development

Community GitHub Stars
type: PropertyValue
value reference: Community

Time to Learn Core Language
type: PropertyValue
value reference: Learning

Null Safety Implementation
type: PropertyValue
value reference: Language Features

Incremental Build Time (Hello World)
type: PropertyValue
value reference: Development Performance

Job Market Availability (US 2026)
type: PropertyValue
value reference: Job Market

Supported Platforms
type: PropertyValue
value reference: Compatibility

Java Ecosystem Integration
type: PropertyValue
value reference: Ecosystem

Hot Reload Capability
type: PropertyValue
value reference: Development Experience

Official Android Support Status
type: PropertyValue
value reference: Official Status

Type System Null Safety
type: PropertyValue
value reference: Language Features

Development Speed (days to simple app)
type: PropertyValue
value reference: Productivity

Runtime Performance (complex task ms)
type: PropertyValue
value reference: Performance

Ecosystem Package Count
type: PropertyValue
value reference: Ecosystem

Compile Time (typical project)
type: PropertyValue
value reference: Productivity

Type Safety Score
type: PropertyValue
value reference: Code Quality

Developer Adoption (primary domain)
type: PropertyValue
value reference: Community

Memory Overhead (hello world app)
type: PropertyValue
value reference: Performance

Multi-threading Support
type: PropertyValue
value reference: Architecture

Lines of Code Ratio
type: PropertyValue
value reference: Language Efficiency

Enterprise Adoption Rate
type: PropertyValue
value reference: Industry Adoption

Maven Central Packages
type: PropertyValue
value reference: Ecosystem

Compilation Speed Penalty
type: PropertyValue
value reference: Performance

Developer Talent Pool
type: PropertyValue
value reference: Community

Android Official Support
type: PropertyValue
value reference: Platform Support

NullPointerException Rate
type: PropertyValue
value reference: Reliability

Coroutine Async Support
type: PropertyValue
value reference: Language Features

GitHub Stars
type: PropertyValue
value reference: Community

StackOverflow Questions (all-time)
type: PropertyValue
value reference: Community Support

Job Market Demand
type: PropertyValue
value reference: Employment

Learning Curve (for experienced programmers)
type: PropertyValue
value reference: Ease of Learning

Apps Using Framework (Flutter/JVM ecosystem)
type: PropertyValue
value reference: Market Adoption

Compilation Speed (hello-world)
type: PropertyValue
value reference: Performance

Hot Reload Support
type: PropertyValue
value reference: Development Experience

Language Maturity (years active)
type: PropertyValue
value reference: Stability

Professional Android Project Adoption
type: PropertyValue
value reference: Market Adoption

iOS Project Adoption
type: PropertyValue
value reference: Market Adoption

Annual Developer Job Postings (2024)
type: PropertyValue
value reference: Job Market

Java Library Interoperability
type: PropertyValue
value reference: Ecosystem

Runtime Memory Overhead
type: PropertyValue
value reference: Performance

Null Safety Enforcement
type: PropertyValue
value reference: Language Features

GitHub Stars (Language Repository)
type: PropertyValue
value reference: Community Adoption

Available Third-Party Packages
type: PropertyValue
value reference: Ecosystem