AI credits are a prepaid balance shared by every AI feature on your account; 1 credit equals $1. The balance is shown at the top of the AI Wallet page (Marketing > AI Tools > Buy AI Credits) as Available Balance, and the same balance is what every Generate/Calculate button checks before it runs. Each successful AI call deducts its cost from the balance immediately (see the pricing questions below), and every deduction is recorded in a usage history that Sprwt staff can review. Credits do not expire in the current version.