Comprehensive Gym App Development

Need to Build an app for my gym. It needs to be able to have the below capabilities: - My Branding Roles - Have many roles based on their sign up - Coach Role - Admin Role - Accounts Role - Owner Role - Developer Role - Member Role Workouts - Workouts with instructional videos - Workouts will be on dates and times of when people attend. - workouts should allow members to fill in there weights - When a new PB is reached and logged in then there is a app alert - Schedule your sessions on the app. - Timings and which coach is on each session should be editable by coaches and admin staff but not members. Messaging - in built messaging like WhatsApp for all members to communicate in one chat. + Group chats - Admins and coaches can message and create chats with certain members. Accounts - Incorporate in the app monthly/fortnightly/weekly membership renewal automation for debiting members. - Auto send invoices to members once debited. - Cards can be edited by members and admin via the app. Plus many more