Booking system for gyms and group classes
Run capacity-limited group classes, sell membership passes, and let members book their own spot — from any phone, anytime.
One month free, then €4.99/mo. No card.
calenda is a booking system built around how gyms and studios actually run: group classes with fixed capacity, automatic waitlists, membership passes and class packs, multiple trainers, and recurring timetable slots. Members book their spot online 24/7 through a widget in your own colours, while you see the whole schedule in one calendar. You pay one flat price of €4.99 per month — with zero booking commission (0%) and no cap on classes, members, or trainers. Switching from Bookio is straightforward, and you can export your data whenever you like.
One system that fits your business.
Group classes with capacity and waitlists
Set a maximum number of spots per class. Once it fills up, the next members join a waitlist automatically and get notified the moment a place opens. No overbooked rooms, no penciling people into a list by hand.
Membership passes and class packs
Sell 10-class packs, monthly or seasonal passes. The system deducts a credit on every booking and each member sees their remaining balance. Add gift vouchers and discount codes to launch new courses.
Multiple trainers and locations, one calendar
Every trainer gets their own schedule, photo, and services; clients can pick a specific instructor or leave the choice to you. The multi-location calendar shows all studios and rooms at once so classes never clash.
Recurring slots and a fixed timetable
Set up regular classes (say, yoga every Monday at 6 PM) once and calenda generates them ahead of time. Handle closed days and holidays in one click, so no one signs up for a session that won't run.
Fewer no-shows, happier members
Automatic email and SMS reminders cut absences, no-show tracking flags repeat offenders, and an optional deposit or QR payment keeps spots for people who actually turn up. After class, members can rate a specific trainer ★.
FAQ
How much does calenda cost for a fitness studio?
One flat price of €4.99 per month, full stop. Whether you take 30 or 3,000 class bookings in a month, the number of sign-ups and the size of your classes never change the price, and you pay zero commission (0%) on online bookings. Unlike Bookio, which charges by booking volume, a busier timetable never costs you more here.
How does the waitlist work when a class is full?
Once capacity is reached, the next member joins a waitlist instead of booking. When someone cancels, the freed spot is offered to the first person in line and they're notified automatically. You never rewrite anything by hand — rooms fill themselves and fewer places sit empty.
Can members book and cancel classes themselves?
Yes. Through the widget or a deep link to a specific course, a member signs up online 24/7, the system deducts a credit from their pass, and sends a confirmation plus email and SMS reminders. calenda recognises a returning member and prefills their details, so re-booking takes seconds.
What languages does the booking widget support?
The widget and confirmation messages work in English, Slovak, and Czech — handy for studios with international clients or expats in group classes. The language switches automatically, and you embed the widget on your site in your own colours with no developer.
Can I move from Bookio without losing data?
Yes. The move from Bookio is designed so you keep your history and contacts, and you can export your data from calenda anytime. The system is fully mobile-friendly, so you can manage the timetable from the front desk on your phone.