Booking an in-person class does not replace the check-in as it does not guarantee the user's presence in the class but only guarantees his/her place in the desired class. 👍
Therefore, when you arrive at the gym, you must perform the check-in through the app in order to confirm that you attended the class. Otherwise, the system will consider the absence of check-in as a non-attendance. If due to any unforeseen circumstances you are unable to attend the class, remember to cancel the booking through the app. 😉