On raw device count, Android isn't close, it's dominant. But global market share is one of the most misleading metrics in mobile. The picture completely inverts in high-income markets.

In the United States, iOS holds approximately 58–59% of the market, with Android at 41–42%. Japan sits at 68–69% iOS. Western Europe ranges from 40% to 55% iOS depending on the country. Meanwhile, Android exceeds 95% market share in India and 85–90%+ across Africa, Brazil, and Southeast Asia.

The practical implication: Android reaches more people, but iOS reaches more spending people in the world's wealthiest markets.

Android's global lead is stable and unlikely to significantly shift. In the US, iOS has held roughly 55–60% for several years. Apple continues to grow in emerging markets as iPhone pricing broadens with older-generation models, but Android's dominance in high-population developing markets (India, Africa, SE Asia) is structural and durable.

Subscriptions

Subscription-based apps earn 87% more revenue on iOS compared to Android. iOS drives 73% of subscription revenue across platforms. App churn is 40% lower on iOS, which compounds over time, a subscriber who stays longer is worth dramatically more than one who cancels after the trial.

Day-1 retention is 23.9% on iOS versus 21.1% on Android, a gap that seems small but matters significantly at scale.

The Android commission advantage

Often overlooked: Google charges 15% commission on subscriptions from day one. Apple charges 30% in year one, dropping to 15% after 12 months. For a subscription business with high volume but modest per-user revenue, this structural difference can meaningfully affect margins.

Ad-based monetization

If your model depends on ads rather than direct purchases, Android's volume advantage matters more. More installs, even at lower per-user engagement, can generate competitive ad revenue, particularly in markets like India and Southeast Asia where ad rates are rising as the middle class grows.

iOS: Swift 6 + Xcode

Swift 6 is the current standard for iOS. It introduced improved concurrency handling with structured concurrency, safer memory management, and deeper SwiftUI integration. SwiftUI, Apple's declarative UI framework, is now the default for new iOS projects, offering faster iteration cycles versus the older UIKit approach.

Xcode runs only on macOS. This is the single largest barrier to entry for iOS development. If your team runs Windows, they need Apple hardware, a real upfront cost. That said, Xcode 16 now includes native AI-powered code prediction for Swift, and GitHub Copilot for Xcode is officially supported with code completions, Copilot Chat, Agent Mode, and support for GPT-4.5, Gemini 2.5 Pro, and Claude 3.7 Sonnet.

Android: Kotlin 2.0 + Android Studio

Kotlin 2.0 is Google's preferred language. It reduces boilerplate by roughly 40% compared to Java, concise syntax, null safety by design, and coroutines for async programming. Java still runs across legacy Android codebases but new projects overwhelmingly choose Kotlin.

Android Studio runs on Windows, macOS, and Linux. Lower hardware barrier to entry. It now ships with Gemini AI integration built-in, and GitHub Copilot support is available here too. A significant 2025 development: Kotlin Multiplatform (KMP) has matured into a mainstream option for sharing business logic between Android and iOS while keeping native UIs on both sides.

2025 development to watch

AI-assisted development is now standard on both platforms. Copilot + Gemini have meaningfully reduced boilerplate writing time for both iOS and Android developers, though neither replaces architectural judgment.

The foldable dimension

A new testing challenge emerged strongly in 2025: foldable and dual-screen devices. This segment is projected to reach $31.3 billion by 2025 with a CAGR exceeding 26%. Developing for foldables requires:

• Dynamic screen ratio adaptation (traditional 16:9 / 19:9 ratios don't apply)
• Fold state detection via device-specific APIs
• Split-screen mode optimization with drag-and-drop and resizable activities
• Continuity, app state must persist when transitioning between folded and unfolded modes

Entry costs

iOS: Mac hardware (from ~$999 used to $2,000+ new) + $99/year developer license. Required, not optional.

Android: Any laptop + $25 one-time fee. Lowest possible barrier.

Development time

iOS builds typically complete 10–20% faster than equivalent Android projects, primarily because fewer devices mean fewer edge cases, simpler QA cycles, and less layout debugging across screen configurations. An app that takes 5 weeks on iOS may take 6–7 weeks on Android, not because the code is harder, but because testing demands more coverage.

Ongoing maintenance

Android maintenance tends to be higher. When Google releases a major OS update, OEM manufacturers add their own interpretation, and the result can break background processes, battery behavior, or UI rendering on specific device lines. iOS updates affect a narrower device surface, and breakages are less common.

However, Apple's App Store guidelines change regularly. An app that fully complied last year may face removal or rejection this year if it uses a deprecated API or violates an updated privacy policy. This is a different kind of maintenance burden, but a real one.

iOS: Human Interface Guidelines

Apple's HIG emphasizes clarity, deference, and depth. The hallmarks: generous white space, hierarchical navigation via tab bars and navigation controllers, flat design with selective depth cues, and extremely consistent component behavior. The minimum tappable target is 44×44pt. SwiftUI makes implementing HIG-compliant UI faster than ever.

Android: Material Design 3

Google's Material Design 3 emphasizes tactile metaphors, bold color, responsive animation, and flexible customization. The navigation model uses a bottom navigation bar, navigation drawer, and a system-level back gesture, fundamentally different from iOS's in-app navigation approach. Jetpack Compose, now the standard UI toolkit, brings a declarative approach analogous to SwiftUI.

For cross-platform apps

If you use Flutter or React Native, you'll need to decide: adopt one design system for both platforms, or implement platform-specific UI conventions. The latter takes more work but produces less friction. Users notice when an iOS app feels like Android and vice versa.