How to delete my account

Under Profile, at the bottom of the screen, tap Delete my account. It cannot be undone.

Your account and your name disappear from the groups. The expenses you logged stay there, because they are part of the other people's balances — deleting them would change the balance of people who asked for nothing.

What is in the Month tab is not deleted here: it lives in your iCloud on iPhone, or on the device alone on Android, and goes away with the app if you uninstall it.