A gym where nothing is waited for
Members walk in with their phone, see how long their membership runs and book a place in a class themselves. The kiosk at the door takes cash even when the desk is closed — and every payment and every entry is recorded for you, by itself.
In daily use in gyms · the kiosk ships assembled · a demo with no commitment
Members come to train, not to wait
What a gym is remembered for is not the equipment but the small things around it: whether you queue at the door, whether you know how long your membership runs, and whether a place in a class has to be begged for by message. Terios was built from that side of the desk.
The phone is the membership card
Tap the phone or a tag and walk in. No plastic card left at home, and nobody to call over to confirm you are a member.
Always knows where they stand
How long the membership runs, how much credit is left and when they last trained — it is all in the app. The reminder before expiry arrives by itself, so nobody finds out at the door.
Books their own place in a class
They see the schedule and how many places are left, book from bed and cancel without apologising in a message. A full session shows as full straight away, not on arrival.
Pays when it suits them
The kiosk works when the desk does not — at six in the morning and after the last class. The payment shows in the app at once, and any overpayment stays as credit.
Meanwhile the owner retypes nothing: every payment, entry and booking is recorded by itself, with a trail of who did what and when.
From sign-up to entry — without a single sheet of paper
The member does their part themselves, from their own phone. What is left for you is the approval and the numbers.
The member signs up in the app
They enter their details and apply to your gym. Until you approve, they have access to nothing — the account exists, the membership does not.
You or your staff approve
The system records who approved and when. The same goes for rejection and suspension — every status change leaves a trail.
The member pays
In cash at the kiosk or with staff at the desk. The payment, the membership extension and any credit from an overpayment are written as one unit — money cannot go in without the membership starting.
Entry by QR code or NFC
The member taps their phone or tag and the system knows at once whether the membership is valid. Every entry is recorded, so attendance is known rather than estimated.
Notifications take care of themselves
The member gets a payment confirmation and a reminder before the membership runs out. The owner is notified the moment the kiosk takes money.
Membership, day pass and group training
Three separate things, not one with exceptions. A day pass is not a one-day membership, and it is not recorded as one.
Membership
A monthly membership with a start and an expiry date. Each gym chooses whether a renewal runs from the expiry date or from the day of payment.
- Credit from overpayment
- Reminder before expiry
- Full payment history
Day pass
A single entry, paid on the spot. Valid for the day or time window you configure, and it never turns into a membership.
- For members and visitors
- Paid at the kiosk
- Visitors never type personal data on the kiosk
Group training
A calendar session with a trainer, duration, capacity and price. Reservations never overlap and never exceed capacity.
- Day-by-day schedule
- Booking from the app
- Attendance records
One app, four different views
Member, owner, staff and trainer open the same app and see entirely different screens. Permissions belong to the gym, not to the account — the same person can be a member with you and a trainer at the club next door.
Member
Walks in with a QR code or a tag, sees how long the membership runs and how much credit is left, books group sessions and gets a receipt the moment they pay.
Owner
Runs one or more gyms, sets prices and plans, approves members and follows payments and attendance. A notification arrives the moment the kiosk takes money.
Staff
Registers members, sells and renews memberships, sees who owes money. Has access only to the gyms the owner assigned — and to nothing else.
Trainer
Opens calendar sessions, sees who is booked and checks people in. Can message a member inside the app.
A desk that does not have to be staffed
The member walks up, taps a phone or a tag, sees where they stand and pays in cash. The payment is booked immediately and the owner is notified — even with nobody on shift.
The gym name, logo and colours are yours — this is only an example.
Banknote validator
The NV9 Spectral recognises and rejects counterfeits. The cash stays in a locked box inside the unit.
QR and NFC at the door
The code in the app is short-lived and signed, and an NFC tag can be revoked and reassigned to another member.
10.1″ touchscreen
A Raspberry Pi in an enclosure, large buttons and little text. After a period of inactivity the screen returns home by itself.
A dropped connection never eats money
A transaction in progress finishes locally and is booked as soon as the connection returns. Every payment carries its own key, so it cannot be recorded twice.
A schedule that runs itself
The trainer opens a session: name, time, duration, capacity and price. The member sees it in the app and books with one tap — while places last.
Overbooking is impossible, and so is booking the same session twice. Whoever turns up is checked in on the spot, so attendance is visible without counting heads.
- No overlapping sessions for the same trainer
- Booking from the app, with no messages or lists
- The trainer sees their own list, not the rest of the system
The switch takes a single day.
We migrate the member list and expiry dates out of whatever you use today — a spreadsheet, a notebook or an older program. No active membership is lost and nobody has to join again.
The software goes live the same day, and the kiosk arrives assembled and configured whenever it suits you. Staff training takes half an hour, because there is not much to learn.
The same rules apply as to our other systems: money and entries leave a trail, and the kiosk keeps working when the connection drops.
“A system that loses payments is not worth installing.”
KolmexWhat onboarding covers
Questions we get
Is the kiosk mandatory?
No. Members, memberships and training work without the device — staff sell memberships from the app. The kiosk is for gyms where it pays off not to have the desk staffed at all times.
What if a member has no smartphone?
They get an NFC tag. The tag is only a key, not proof of identity — it can be revoked and reassigned if it is lost.
Can one owner run several gyms?
Yes. Roles and data belong to the gym rather than the account, so the same person can own one, coach at another and train at a third — with no data crossing over.
What happens if a member overpays at the kiosk?
The difference becomes credit at that gym, with an entry in the ledger. Each gym chooses whether credit is spent automatically or only when the member decides to use it.
Does it work in my country’s language?
Serbian is the default and the language is set per gym. For neighbouring markets we add the language before the first gym in that country goes live.
What about member data?
One gym’s data is never visible to another. Photographs and personal details are stored separately and reached only with authorisation, while the kiosk screen shows the minimum needed and clears it after every session.
See how it works in your gym.
Tell us how many members you have and how you keep records today. The demo runs on your numbers — your plans, your prices and your way of taking payment, not a generic slideshow.
- The demo takes 20 minutes and commits you to nothing
- We migrate your existing member list and expiry dates
- The kiosk arrives assembled and configured — or you start without one