General Troubleshooting Back to Top
Restart your iPhone.
Often a simple restart of your iPhone can solve any problems you're experiencing. Try this first.
Quit and relaunch the application.
- From the Home screen, click the Home button twice.
- Tap and hold on the app.
- When it starts to jiggle, tap theClose icon to close it.
- Double-click the Home button and try opening the app again.
Redownload and Reinstall the Application.
If quitting and relaunching the application doesn’t fix the problem, nor does restarting your iPhone, you maybe want to try re-downloading the application. Install Checkmark from scratch and see if the problem persists. Be aware that removing the application from your iPhone will delete all application data for good, so you may want to take note (write down or screenshots) any existing data you have in Checkmark so that you can quickly re-enter it after re-installing.