Maintaining a workout habit is harder than starting one. Fešifitness therefore does not rely on every client remembering their next visit. When a client's usual rhythm begins to slip, Retenzio gets in touch.

Since launching in May 2025, messages from Retenzio have helped generate 2,188 additional bookings and increase revenue by CZK 369,823. Of the 9,640 SMS messages sent, 22.7% led to a booking. More than one in five messages therefore ended with a new appointment.

Seven locations where an empty hour is immediately lost revenue

Fešifitness operates seven private gyms in Ostrava, Havířov and Šenov. Clients reserve the space for themselves rather than exercising in a crowded gym. That gives the client privacy, but it also means that every empty hour is capacity the operator cannot sell later.

By the end of July 2026, Fešifitness had more than 4,300 clients on record. Over 800 of them had made at least ten visits. Regularity is the foundation of the model - and also its weak point. Two missed sessions can be enough for a weekly habit to turn into an indefinite delay.

The foundation: a reminder in the right week

The “client did not book their next appointment” scenario delivered the largest share of the result. It follows each client's previous rhythm and reaches out when the next booking is missing. During the period measured, its 7,491 messages led to 1,693 attributed bookings - a 22.6% conversion rate.

Alongside it, Retenzio follows up after cancellations, recommends open slots to relevant clients and supports one-off campaigns when Fešifitness has a specific reason to get in touch.

A year and a quarter in numbers

That is an average of 146 bookings and approximately CZK 24,700 in additional monthly revenue. The final three months brought 73% more bookings than the previous period. The best result of all came in July 2026: 297 bookings and CZK 52,470 in additional revenue.

Across the whole period, Fešifitness invested CZK 18,690 in Retenzio. Every CZK 1 invested helped generate almost CZK 20 in additional revenue.

What drove the results

Clients return repeatedly. The attributed bookings came from 857 different clients, and 459 booked more than once. A total of 119 clients booked at least five times. One client came back after our reminders 29 times over the year and a quarter - each time following a new message sent when their next booking was missing.

A quick follow-up after cancellation works even better. The 597 messages sent to clients without a replacement appointment led to 175 bookings - a 29.3% conversion rate.

Even a heatwave can be a relevant reason to get in touch. Two one-off outreach efforts explaining that clients could train in air conditioning sent 405 messages and attributed 90 bookings and CZK 16,580 in additional revenue.

We help fill the whole network's calendar. During the same period, 28,044 valid bookings were created across Fešifitness - and for roughly one in thirteen (7.8%), our message helped the client make the booking.

Why the best month came after a year

In June 2026, we added open-slot recommendations to the existing scenarios. When a gap appears in the calendar, Retenzio offers it to clients for whom the time may be relevant. In its first two months, the scenario sent 912 messages and attributed 202 bookings and CZK 37,401 in additional revenue.

The new scenario helped Fešifitness reach record results in June and July - right in the middle of summer. That is the value of a long-term partnership: the setup is not fixed once and left alone. New scenarios can be added as the operation's needs change.

How we calculate the numbers

We include a valid booking when it is created after a sent message and falls within Retenzio's attribution window. We exclude cancellations and no-shows and count each booking no more than once.

For 201 attributed bookings, the booking system did not provide a positive price. We count those as zero revenue, making CZK 369,823 a conservative figure in that respect. These are still attributed revenues, not accounting profit or the result of a controlled experiment.

Half of all attributed bookings were made within approximately 35 hours of the message being sent.

A habit can be supported automatically

Fešifitness did not need to send blanket discounts. It needed to reach clients whose next workout was missing, offer a replacement after a cancellation and use open capacity across seven locations.

Since launch, that has amounted to 2,188 attributed bookings and a CZK 369,823 increase in revenue from CZK 18,690 invested in Retenzio.

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P.S. This case study is based on data from Retenzio and the Fešifitness booking system from May 2025 through July 2026.