You can delete your account from inside the Tide app:
Your account, all cycle history, all daily logs, all sleep and pad change records, and all personal settings. Deletion happens immediately.
Once you delete your account, there is no way to recover any of your data — not by signing back in, not by contacting support, and not after any waiting period. Please be sure before confirming.
If you signed in with Apple, we also tell Apple to revoke your Sign in with Apple credential for Tide at the time you delete your account.
If you'd rather change a setting, pause notifications, or fix something specific instead of deleting, please email support@zenkolabs.com first — many things can be addressed without losing your data.