How to Test Your App Like a Pro Before Launch
Most apps that get rejected or receive bad reviews failed a test that could have been done before launch. Here is how to test your app systematically, what order to do it in, and what tools to use at each stage.
The right order of testing
Testing in the wrong order wastes time. Run a health check first — if your binary has basic issues, other testing is pointless. Then test functionality on real devices. Then test for edge cases, performance, and accessibility.
Health check (binary scan)
30 secondsCatches instant-rejection causes before anything else. Free.
Functional testing on real device
2–4 hoursConfirms core flows work. The foundation everything else builds on.
Compatibility testing (multiple devices)
2–8 hoursDevice-specific crashes are invisible until you test on that device.
Performance and network testing
1–2 hoursReal users are on old hardware and poor connections.
UX testing with unfamiliar users
2–4 hoursFirst-time user confusion is invisible to your team.
Accessibility check
1 hourRequired for store compliance and affects real users.
Human testing (crowd)
48 hoursReal testers on real devices find what all the above missed.
What to test in each area
Functional testing
CriticalDoes every feature work as intended? Test every user flow from start to finish: registration, onboarding, core features, settings, logout, and re-login.
How to do it
Write a test script covering every screen. Execute it fresh on a real device, not a simulator. Run it as a new user with no prior state.
Compatibility testing
CriticalDoes the app work across the device models and OS versions your users actually have? Crashes that only happen on specific hardware are real and common.
How to do it
Test on at least 3 physical devices spanning old and new hardware. Use a device farm for broader coverage. Check your analytics for top devices in your target market.
Performance testing
HighIs the app fast enough? Does it drain battery excessively? Does it perform well on a device that has been used for a year with 50+ apps installed?
How to do it
Use Xcode Instruments (iOS) or Android Profiler to measure memory, CPU, and battery usage. Test on older, lower-spec devices representative of your user base.
UX testing
HighCan a person who has never used your app complete the key flows without confusion? Internal team testing does not catch first-use confusion.
How to do it
Have 3–5 people unfamiliar with your app complete specific tasks without guidance. Observe without helping. Note where they hesitate, tap incorrectly, or give up.
Network conditions testing
HighDoes the app handle slow connections, offline mode, and network interruptions gracefully? Real users are often on poor connections.
How to do it
Use Xcode Network Link Conditioner or Android emulator network throttling to simulate 3G, poor WiFi, and no connection. Test what users see during each condition.
Accessibility testing
MediumCan users with disabilities use your app? VoiceOver / TalkBack compatibility, colour contrast, and touch target size all affect real users and App Store review.
How to do it
Enable VoiceOver (iOS) or TalkBack (Android) and navigate the entire app without looking at the screen. Check colour contrast with an accessibility scanner.
Security and privacy testing
MediumAre permissions appropriate? Is sensitive data protected? Does session management work correctly? Are there any data leaks visible in the UI or app switcher?
How to do it
Audit every permission against actual use. Test login lockout behaviour. Check the app switcher for data exposure. Verify the privacy policy link is functional.
Store submission readiness
CriticalDoes the binary meet store requirements? Debug build, signing, SDK versions, missing privacy manifest — these cause instant rejection before a human reviewer sees the app.
How to do it
Run the AppTester Health Check. This automated scan catches all binary-level rejection causes in 30 seconds.
The one thing most developers skip
Testing your own app means testing it as someone who built it, knows what every button does, and has never experienced the onboarding as a stranger. Your team has the same blind spot. The single most impactful thing you can add to your testing process is having people who have never seen your app try to complete real tasks. This is what human crowd testing provides — and it consistently surfaces issues that every other form of testing misses.
Test your app the professional way
Start with a free Health Check. Add human testing from $19. Real testers, real devices, structured bug reports within 48 hours.