Public web page required by Google Play ("account deletion URL"). Publish it next to the privacy policy.
From the app: Settings → Account → Delete account → confirm.
Without the app: email [email protected] from the address of your account with the subject "Delete my account". We confirm within 7 days.
What is deleted (within 30 days): your account and login, your push tokens, houses and members that only you can access, their stock, medicines and settings.
What is kept: houses you share with other members stay for them; your membership is removed. We do not currently keep automatic backups; if we start to, they are overwritten within 7 days. We may keep records we must keep by law.
You can also delete only some data (for example medicines) in the app without deleting the account.