Guideline 2.1
App crashes on launch or during use
The app crashed during review on specific devices or iOS versions. This is the most common 2.1 rejection. Often caused by untested device configurations, missing nil checks, or force unwrapping optionals.
30 cases reported · ~3 days to resolve
Apple's rejection message
Guideline 2.1 - Performance - App Completeness: We discovered one or more bugs in your app when reviewed on [device] running iOS [version]. Specifically, the app crashed on launch.