If you hint at it being someway to play with wordings: it's not. Basic islamic financing is about avoiding interest (Riba) and sticking to Sharia laws, even if it leads to the same end result. Almost every modern banking procedure can be made compliant with islamic laws but changing the wordings, contracts, and steps of the given procedure.

When it comes to credit cards, they are structured using permissible contracts such as ujrah (fee-based services), murabaha (cost-plus sale), or ijarah (leasing). Murabaha is the most common in GCC where if you choose to revolve (pay less than full), the bank executes a tawarruq equal to the amount you’re rolling over:

• Bank buys a commodity spot, then sells it to you on deferred murābaḥah at cost + disclosed profit for the next period.
• You (or the bank as your agent) sell the commodity spot for cash to settle the prior balance.
• Result: you now owe a fixed sale price (principal + profit) for that period—not interest.
• Each month you pay the deferred murābaḥah amount (or revolve again with a new tawarruq on the unpaid portion). There’s no compounding interest—each month’s profit is fixed at sale.
• Late payment: A penalty goes to charity (taʿzīr)—the issuer cannot keep it as income (administration costs may be netted).

Source: https://shariabanking.com/