How can I cancel my Premium subscription?

It is possible to cancel the Premium offer from the web application only at this time.

Login to the web app here -> https://phone.onoff.app
Go to "My Account"
Then "My subscription" or directly here -> https://web.onoff.app/settings/plans
and cancel the offer.

After canceling your subscription, you can continue to use the features of the Premium offer until the expiration date of the current period.

For information, account deletion will automatically result in the cancellation of your Premium subscription.