I test the same app on Android and iOS every sprint, and the two builds share most of their behavior. The rest is where the bugs live. Android vs iOS testing is not a debate about which platform is harder — it is about knowing which differences actually produce defects, so your limited testing time goes where it pays off.
Fragmentation vs uniformity
Android's biggest testing cost is fragmentation. Between OS versions, manufacturer skins, and screen sizes, the same APK can behave differently on a Samsung mid-ranger and a Pixel. Manufacturer layers change default fonts and dialogs, and aggressive battery optimizers on some devices kill background work that runs fine elsewhere. iOS is the opposite: a handful of device models and fast OS adoption. In practice, Android needs a small device matrix — I keep one low-end device, one Samsung, and one stock Android in mine — while iOS usually needs the current OS plus one version back.
Permissions and back navigation
Both platforms use runtime permission prompts, but the failure modes differ. On Android, a user can deny a permission twice and the system stops asking entirely, so the app has to route them to Settings; test that recovery path explicitly. On iOS, the prompt appears once and any change happens in Settings, so the interesting case is what the app does when a permission is revoked mid-session.
Back navigation is a purely Android problem. The system back gesture works on every screen whether the developer planned for it or not. Some of my favorite bugs came from pressing back in the middle of a payment flow or on top of a bottom sheet. iOS has no system back — only whatever navigation the app provides — so that whole bug class cannot exist there. If your suite never presses back at awkward moments, it is not really testing Android.
Keyboards, and why I always test in Arabic
Android users install third-party keyboards; iOS users mostly cannot. Gboard, Samsung Keyboard, and SwiftKey each handle autocorrect, suggestions, and autofill a little differently, and I have seen input bugs that only reproduce on one of them. As a native Arabic speaker I always add an Arabic keyboard pass: switching to RTL input moves the caret, flips alignment field by field, and mixed Arabic-Latin strings — an Arabic name next to an English email address — break naive validation more often than you would expect. If your app ships in an RTL market, this deserves its own checklist item on both platforms.
Emulators, simulators, and store review
The Android emulator emulates a full device, so it is slow but reasonably faithful. The iOS Simulator is not an emulator — it runs natively on your Mac, which makes it fast but means push notification delivery, camera behavior, and real performance need a physical device. I treat both as fine for functional flows and untrustworthy for performance, notifications, and anything touching hardware.
Release logistics differ too. An iOS bug that slips through costs more, because App Store review sits between you and the fix, while Google Play offers staged rollouts you can halt. I plan regression depth accordingly and go deeper before an iOS release, because recovering from a bad one is slower.
Android vs iOS testing with one shared suite
My Maestro flows run on both platforms from the same YAML, and they cover the shared majority well: login, the core business flows, form validation, anything driven by the API. What one suite cannot honestly cover is the platform-specific remainder — permission recovery, back navigation, keyboard and IME behavior, OS-level interruptions like calls and low-battery dialogs. I keep those as a short exploratory checklist per platform instead of pretending the automation has them handled.
Rule of thumb: automate what the platforms share, and write the differences down as an explicit per-platform checklist. The bugs that reach production are almost always on the list you never wrote.