Mobile App UX Checklist: 15 Things to Verify Before Launch

Why launch quality is a retention metric

The first session a user has with your app is disproportionately important. Research on mobile app behaviour consistently shows that 25% of apps are used only once. The most common reasons for abandonment are: confusing onboarding, slow load times, unclear value proposition, and UX friction in core flows. None of these are problems with what the app does — they are problems with how it has been designed to be experienced. This checklist addresses each of them.

Onboarding and first use

• The app's core value is demonstrable within the first 60 seconds of use
• Sign-up asks for the minimum required information — no fields that aren't immediately necessary
• Social sign-in (Google, Apple) is available and works correctly
• The empty state (no data yet) explains what the screen will look like and suggests a first action
• Permission requests (camera, location, notifications) are triggered contextually, not all at once on first launch

Navigation and information architecture

• The primary navigation is visible without scrolling and requires no more than one tap to reach any main section
• The active state of navigation items is visually clear
• Back navigation is always available and works as expected
• Deep links resolve correctly (links from notifications or external sources navigate to the right screen)
• No more than three levels of navigation depth to reach any core feature

Core flows

• The critical user journey (the one most users will perform most often) has been tested on a real device by at least five non-team members
• Every form has correct keyboard types for each field (email keyboard for email, number pad for phone numbers)
• Form fields validate inline, before submission
• Error messages explain what went wrong and what to do, not just that something failed
• Loading states are present for every operation that takes more than 300ms

Performance and stability

• The app launches in under 3 seconds on a mid-range device (not just the latest flagship)
• Scrolling is smooth at 60fps in all list views
• The app handles no-network and poor-network conditions gracefully (not with a crash or blank screen)
• Memory usage has been profiled and there are no obvious leaks causing performance degradation over time
• The app has been tested on the three most common screen sizes for its target platform

Accessibility

• All interactive elements have accessibility labels for screen reader users
• Minimum touch target size of 44×44pt for all tappable elements
• The app is usable at both the smallest and largest Dynamic Type sizes on iOS
• Colour is not the only means of conveying information (e.g. error states have icons in addition to red colour)

Our app development service includes a thorough UX audit against this checklist before any build is considered ready for launch.