Applying an activation code
Activation codes can be used to credit accounts with study time. These are used in school programs, and in special situations where extra study time is applied to accounts. These codes can be applied after you've signed up for an account, or alternatively when signing up for a new account, and don't need to be used in conjunction with a credit card. Apple and Google will not check for this kind of code before charging for renewal, so please make sure you unsubscribe from auto-renewal before you add the study time to your account to avoid any unexpected charges.
Applying an activation code to an existing account
You can use an activation code after you've signed up by accessing your Account's subscription page.
Applying an activation code when signing up
You can use a coupon code instead of payment information when signing up for a new account.