Deleting your PayDas account
In the app (recommended): Settings → Account → Delete my account. For security you may need to have signed in recently; if the app asks, sign out, sign in again and repeat the step. The same step works if you use the app as a guest (without linking an account).
If you can't access the app: email info@if-ies.com from your account's address with the subject "Delete my PayDas account". It will be deleted within 30 days and you will be notified.
Deleted: your profile, name, email, IBAN and sign-in data, as soon as you delete the account; you leave all groups. Groups you manage get another member as manager; if you are the last member, the group is deleted too. Kept: so your friends' balances stay correct, past expenses and payments show "Deleted person" in place of your name. These records are kept while the group still has members. Data stored on your phone is removed when you uninstall the app.
Deleting data without deleting your account
You can delete part of your data and keep your account:
IBAN: edit your own person in the group, clear the IBAN field and save.
Expenses: you can delete an expense you added; it is removed from all balances.
People: a group manager can remove a person whose balance is settled.
Anything else: email info@if-ies.com saying which data you want deleted. It will be deleted within 30 days and you will be notified.