Clear cache by:
- Open settings
- Scroll down till you see Fitvault and tap On Fitvault
- Toggle Clear Cache
- Make sure you allow access to Background App Refresh
If that doesn’t work you will need to completely delete the app:
- Tap to open Settings.
- Tap General.
- Tap iPhone Storage.
- Find and tap on Fitvault.
- Tap Delete App. Do not select Offload App, as this keeps the data you’re trying to delete.
- Tap Delete App again in the slide-up prompt.
- Reinstall the app from the App Store.