If you do not have an IDAGIO account, yet:
Please go to https://www.idagio.com/redeem/
where you can enter your voucher code and
create an account in one step.
If you already have an IDAGIO account:
In your browser, please go to https://app.idagio.com/account
where you can enter your voucher code.
Please be aware that vouchers cannot be applied to accounts
that have a running Apple or Android subscription without first
cancelling the subscription.
Please get in touch if you have any questions.