You can also redeem your voucher code later. There is only one important difference in terms of effectiveness: as long as you are still in the two-week test phase when you enter it, the voucher code will be offset against the first debit in good time.
If you enter the voucher code after the trial period has expired, it will not take effect until the following year. The same applies in the case of the monthly subscription. But don't worry about that! It is enough if you contact us from support. We would then simply cancel your current subscription and take out a new one with the existing code. We will of course reimburse you for the overpaid amount.