Digital payment platforms help clients complete a payment and give the freelancer records of what happened to it. Freelancer accounting software helps organize the work's financial side: invoices, unpaid balances, expenses, bank activity, and reports. A convenient way to accept a card does not replace those wider business records.
The best arrangement depends on how the freelancer sells. A consultant billing after an assignment may need only the payment connection already offered with invoicing. A photographer taking online booking deposits or a designer selling downloads may need payment capabilities linked directly to the selling process. In either case, the financial records still need to tell the whole story.