You don't have to add your credit card during registration in Setapp, but you'll need to provide it when the trial is over. Thus, you’ll get an email reminder from us, and if you enjoyed Setapp and want to keep going, you'll need to specify your payment details in the online Setapp account.
Note that the trial period starts when you install Setapp on your Mac. The fixed subscription fee constitutes $9.99 + taxes.
You can extend a trial period up to half a year. Just invite your friends to Setapp and get an extra month for everyone who joins. You have six invites in your personal online account.
You can cancel your subscription anytime in your online Setapp account. It is free of charge.