Settings is reached from the Home tab and holds seven things, some of which only appear in certain states.

The menu

ItemWhat it does
Upgrade to ProOpens checkout. Shown only without an active subscription
Active subscriptionOpens the subscriptions screen. Shown only with one
Create your accountSign-up flow. Shown only when you have no email on the account
Signed in as:Your address, in place of the item above, once signed in
Study settingsDaily hands target
Key ConceptsThe built-in glossary
PlusEV Discord GroupOpens the Discord invite
Sign outEnds the session on this device
Delete accountPermanent deletion, at the bottom of the screen

Signing out

Signing out returns you to the welcome screen. Your account is untouched, and signing back in with the same method restores your queue, stats and history.

One thing to check first: if you have never created an account, there is nothing to sign back in to. Progress on a device with no account is local to that device. See creating an account.

Deleting your account

Delete account at the bottom of Settings, then Remove account to confirm. The confirmation is explicit about the scope:

Are you sure you want to remove your account? This action will permanently delete your account and all associated data. This cannot be undone.

That includes your study queue, learned hands, category percentages and EV history. An active subscription is a separate matter, held by Apple or Google, and deleting the account does not cancel it. Cancel the subscription first, through your app store, if you do not want it to renew.

You can also request deletion from the web, without the app, at plusev.poker/delete-request.