Be able to mark out on the calendar when a client is training with a trainer or training alone
So that it is clear.

Add in person session as workout

This ^

Allow for clients to be able to book in for group sessions/Bootcamp’s etc... and offer push notifications, class limits, wait lists etc...

It would also be helpful to sync this option for their Google calendars and the same for group exercise

Accept booking and payments
Create events & classes
Class registration and payments

A calender and booking service to book in 1on1 clients like "Timely".

needs to be set up so that only clients who have a payment arrangement with the trainer - can book a session. Maybe trainers can select clients on the database who can book personal sessions.

It would be nice to include the ability to track how many session (in sessions or minutes) a client has left. We sell hour long sessions in various packages, but a times a client can only train for 30 or 45 minutes.

Make an easy way for trainers to add client PT sessions to their own calendar (in app) and notify the client immediately via email, text etc. Other options can include consults via Skype, online planned client catch ups and any custom booking.

This would sell well for businesses with multiple trainers and centralised bookings. I would be able to get Trainerize to be used by the University gym I work for if this feature was available. As it stands you lose a certain valuable contract.

Seems like this should be a simple resolution. To be able to add a custom event on a calendar... 1:1 in person session, assessment, re-assessment, etc.

Where i go to schedule the clients workouts it would be nice to have the option to schedule a session, so instead of it saying a workout it will say Training Session and remind them that day they have an in person personal training session.