Precheck tells you whether your mobile scan will actually work. A quiet report can mean a secure app, or an app that never got past its login screen. Precheck installs your app on a real device and opens it. Then it logs in with your credentials and follows your UI prompts. Every screen is marked with its status, so you see at a glance what works and what doesn't. Each status comes with the specific reason behind it, and how to remediate it. A prompt can fail while the app still works. A rejected password blocks everything behind the login. The scan is then marked as an error, with the reason. The rest of the scan keeps running, and delivers every result it can. Know your mobile scan works before it runs for hours.