Please send an email using the in-app Send Feedback button. To do so, tap Menu->About and then Send Feedback. This email will include info that will help find your account and diagnose the problem. Screenshots are always helpful!
Please send an email to email@example.com, including as much info as you can about your device (iOS/Android version, device brand/model).
All data is stored in a Google FireStore database. Should be good to go, and it's pretty much just an email address. We do send email and a few bits of information about your device to a service called Bugsnag, which shows us crash reports to help debug issues 'out in the wild'. You won't get any unsolicited emails from either Firebase or Bugsnag.
Please send an email to firstname.lastname@example.org. We will get it deleted ASAP!