iOS vs Android: Which Platform to Build First

The iOS vs Android decision is one of the most consequential choices for startups and companies launching their first mobile product. Globally, Android holds approximately 72% of the smartphone market, while iOS holds roughly 27%. However, these numbers mask important regional and demographic differences. In the United States, iOS holds approximately 57% market share and dominates among higher-income demographics. In Europe, the split is closer to even. In India, Southeast Asia, and Africa, Android dominates with 85-95% market share. Revenue patterns also diverge: iOS users spend roughly 2x more on in-app purchases and subscriptions, making iOS the higher-revenue platform per user despite its smaller global market share.

From a development perspective, iOS offers a more controlled environment. Apple's device lineup is narrow (roughly 10-15 actively supported models), screen sizes are standardized, and OS adoption rates are high (80% of users run the latest or second-latest iOS version within months of release). This reduces testing burden and lets developers target recent APIs confidently. Android's device fragmentation is the opposite: thousands of device models, varying screen sizes and resolutions, and slower OS adoption (only about 30-40% of Android devices run a version released in the last two years). However, Android development has improved significantly with Jetpack Compose, Kotlin, and Google's investment in testing infrastructure. Development costs for a typical app are roughly comparable between platforms, with Android sometimes costing 10-20% more due to fragmentation-related testing.

Adapter's recommendation depends entirely on the client's target market and business model. For B2C subscription products targeting North American or European users, we typically recommend iOS first because of higher per-user revenue, lower fragmentation testing costs, and the App Store's curated discovery model. For products targeting global markets, emerging economies, or user bases where Android dominance is clear, we recommend Android first. For B2B products, the choice often depends on the enterprise device policies of target customers. Many enterprises standardize on iOS for security and manageability. We also strongly recommend that clients evaluate cross-platform frameworks if they can not afford to be single-platform for long. React Native or Flutter can get you to both platforms simultaneously for a modest additional investment compared to building one native app, which often makes the iOS-vs-Android question moot.