The Workit app loads its data online, so first check your internet connection. A weak or unstable signal is often the cause of problems when opening the app, booking or checking in.
Still having trouble? Restart your phone, then delete and reinstall the app. Also make sure you have the latest version. Still not working, and did you miss a check-in because of it, for example? Contact us. We'll remove the missed check-in (and any fee) for you and help figure out what's going wrong.