When SnipNotes refuses to launch or crashes often, you can do the following:
This will delete all settings and some internal data, but keep your notes fully intact. It will also not remove a PIN code. (For this you have to reinstall the app from the App Store.)
If resetting all settings doesn’t help, you can try to delete your local data. Repeat the process from above and (in step 3) turn on the switch named “Delete local data” instead.
This will remove your local notes and re-download all your data from iCloud. You will lose data not backed up in iCloud and the contents of your trash.
Deleting the app from your device and reinstalling it from the App Store can be used as a last resort. This will also remove all your local data and settings, so please make sure everything important is stored in iCloud.
If you risk losing anything important, please get in touch with me first and provide as many details as you can on the actions you did before the issue. I’m eager to fix these problems and every little detail can be helpful.