iOS Diagnostics may refer to:
- /Applications/iOS Diagnostics.app - a hidden iOS Application used to diagnose <8.3 devices at the Genius Bar.
- /Applications/Diagnostics.app - a hidden iOS Application used to diagnose ≥8.3 devices at the Genius Bar.
- /Applications/CheckerBoard.app - a hidden iOS Application used to diagnose ≥10.3 devices, that can only be accessed from a combination of buttons on boot.
- iOS Diagnostics (Internal App) - the equivalent of Behavior Scan for iOS.