If you take out a subscription in the app, payment runs through Stripe, your gym’s payment service. Your gym’s name appears on your bank statement.
The first payment. With iDEAL, Bancontact, credit card or SEPA direct debit. If you pay with iDEAL or Bancontact, you also authorise the following instalments.
After that. Each instalment is collected automatically. When the next one is due and how much, you see under Profile → Your subscription.
If a collection fails. For example because of insufficient funds or an old account number. It’s then retried a few times. You get an email with a link to pay yourself or update your details, and the app shows Arrange payment.
Access paused. If a payment stays outstanding for too long, fourteen days by default, your gym pauses your access. You get an email about it. If you pay after all, everything opens up again by itself.
Changing account number or card. With Change payment details under Your subscription. Do it before the next collection is due.
Reversing a direct debit. You have the right to have your bank reverse a direct debit. That doesn’t cancel the payment; it gives you your money back until it’s been sorted out. If there’s a mistake, contact your gym first; that’s quicker.
Paying another way? Cash or by bank transfer at the front desk is also possible, if your gym agrees to that. Then there’s no direct debit.