Massage shops, spas, nail bars and hair salons run on the same POS as a restaurant. Set the business type to salon and the system turns on the features that fit the work.
See who is free and when, book a customer in on the spot, and block out a stylist's break.
Set commission as a fixed amount or a percentage per service. The system totals it per person per round, and you can sell courses that deduct a session each visit.