“Am I paid up?”
At the end of the month you don’t know who owes you their dues.
A member leans on the counter and asks if they’re paid up. You open the notebook, look for the last name and count weeks backwards. Behind them, three people are waiting to get in.
The ones who stopped coming two months ago are still on the list, and the one who owes you three months isn’t on any list: you find out when you run into them on the street.
One just like it, running every day
232members in the app, and every payment recorded under the name of whoever took it · Oro Gym, Buenos Aires
Nacho runs a gym in Buenos Aires. He wrote the payments in one notebook and the collections in another, and there was no way to know at a glance who owed what.
I built him a phone app. Nacho takes payments standing behind the counter while people come in: a system that asked him to sit at a computer was one he would never open.

I used to write everything in a notebook and the collections in a little book. Now I open the app in the morning and see exactly who paid, who owes and who to contact. A huge change.
Read the whole caseOpen the Yusta Gimnasio demo
Yusta Gimnasio: Members, dues, check-ins and classes with limited spots. The interface is in Spanish today. Which language it ships in is set per build.
What goes into the one for a gym
These six things are what Nacho uses every day:
- Each member’s record, with their plan, their due date and what they paid.
- A single screen with the overdue, the ones due this week and the paid up, sorted by what they owe.
- WhatsApp from the record, with the message already written. Collecting means sending the message: if you have to leave the app and look up the contact, it doesn’t get sent.
- The day’s cash, split into cash and transfers, closed on the same screen where you take payments.
- Classes with limited spots and who signed up.
- One profile for you and another for whoever is at the counter, with different permissions.
They all start with the same things: users with permissions, a daily cash register, a dashboard with payments and due dates in plain sight, and WhatsApp from the client’s record. You open it from the shop’s computer and from your phone, and the database keeps every minute of the last seven days.
What it costs
From USD 1,000, paid once.
The one I built for Oro Gym is in the Base tier: USD 1,000, delivered in 3 to 5 weeks, with 30 days of adjustments and 1 month of maintenance included. Yours depends on how many screens it needs; the quote comes within 24 hours, with the scope in writing.
Free gym systems are almost always a spreadsheet under another name, or a desktop program you have to sit down to open. That’s the problem: you’ll use yours standing up, with someone waiting on the other side of the counter.
Here you pay once and there is no monthly subscription. The repository, the domain and the database stay in your account, in your name. See the four tiers
Tell me how you work and I’ll show you the one for a gym
You write to me and I answer myself. I’m Nicolás Yusta, and I’m also the one who writes the code.
WhatsApp: +54 9 11 2469-3394