To mark a member as attended:

1. Go to the calendar under the SCHEDULE tab
2. Please note that a Trainer (staff role set to Trainer) can only see his or her own scheduled sessions. However if the trainer presses on View all Events, he or she can still see other staff's sessions and mark attendance from there on behalf of other trainers or staff.
3. 
4. Select the class you want to mark members as attended under the relevant date and time
5. Tap on MEMBERS
6. Tap MARK ATTENDANCE next to the members who attended the class
7.