Software for personal trainers
One app for you, one for your clients. Everything you write in yours shows up in theirs.
Looking for the client app?a month, unlimited clients
App Store rating, client app
days free, no card
Tap the set, type the weight, move on. Two clients can stay open at once.
Last week's numbers and the rest timer are on the same screen.
Video, cues and every set this client has logged.
Weight lifted, sets, time and training load, week by week.
Everything else coaching needs, in the same app.
Weight, measurements, photos and a note, on your schedule.
Workouts and rest days, so clients know what is next.
Injuries and preferences, pinned where you will see them.
Build a block once, copy it to the next client.
Film your own. They sit next to the 450+ built in.
Built into the plan, not explained in a note.
Log sessions for clients who never install the app.
Apple Health and Health Connect feed the client's charts.
Sets save on the phone and sync when you are back online.
Ask in plain language. It builds the plan inside your workspace.
"Write Marek a four-week lower body block." It reads his history and builds it.
Film an exercise. It names it, describes it and tags the muscles.
Four steps, the same for in-person and online clients.
Add everyone you coach, in person or online.
Sets, reps, weights and rest times from 450+ exercises.
Log it in the gym, or watch what online clients finish.
Volume, 1RM and measurements per client, without a spreadsheet.
Every client gets the full app free on iOS and Android. Premium unlocks the AI for the clients you choose.
"A very good and very nicely designed app where I can track and log my entire workout. Besides this feature, there are many others various types of workouts, exercise demonstrations, etc. A very good app in my opinion."
"Perfect app, beautifully made. I love the description for each exercise and the video demonstration that goes with it, as well as the training plans. Finally, there's a workout app that suits me and is exactly what I had in mind."
Most trainers land somewhere in the middle.
The people you already train. Their history starts from your first session.
You meet some days and send a plan for the rest.
If a client moves away, nothing changes on your side.
One plan covers all three. Every plan has unlimited clients.
Paper and WhatsApp compared with Onyx.
Free, but it costs you every evening.
€29 a month, however many clients you have.
Your clients use the app for free. You pay, they do not.
14 days free, no card, cancel anytime. A premium slot switches on the AI for one client you choose.
Yes. With a trainer account you can run paired sessions: coach two clients in the same session and log both of their workouts directly on your own phone.
Yes. Onyx Coach has a standard MCP connection. You approve it once, choose what the assistant may read and what it may change, and you can revoke it at any time. There is also an assistant built into the workspace if you would rather not connect anything.
Yes. Create an offline client and log their sessions from your phone. No invite is sent. If they want the app later, invite them and their history comes with them.
Your clients never pay for the app. Premium is something you grant to a client from the slots in your plan. It unlocks AI search in 100+ languages, AI-picked exercise swaps and recommended workouts for that client.
No. Check-ins, calendars, your own exercise library, the AI and human support are all in every plan. The only difference between Pro and Elite is the number of premium client slots.
Yes. Premium support is included in every plan. Talk to a real person within hours. We help you onboard your first clients and migrate your existing plans.
If you want to continue, you pick a plan inside the app. We don't ask for a card upfront, so there's nothing to cancel and you'll never be charged automatically.
Yes. The platform and premium support are available in English, Slovak, Czech, and German.
What four industry reports say about why clients leave, and what to change before they do.
How long the average in-person client stays
It is almost never the coaching. Clients quit over a commute, a full week and a bill they can cancel, and it happens in months two and three. The report tracks that dip and prices it on a client base your size.
Create your account in a minute. 14 days free, no card.
14 days free, no card
Start free
