FitOS

For personal trainers and fitness coaches who run their clients from WhatsApp and spreadsheets

Your plan. What they actually did.

See each client’s planned workout next to the real one, with a suggested next step you can send, edit or hold. No more digging through WhatsApp. Free for coaches, nothing for clients to install.

Join the beta

Free beta for coaches · Nothing to install · Works on any phone

A trainee holding a kettlebell in a goblet squat in a dim, modern gym (illustration).
Maya · Goblet squatPlanned next to actual, set by set
Per set: target 10 reps at 16 kilograms. Actual: 8 reps at 12 kilograms, then skipped with the reason “Gym was crowded”, then 8 reps at 12 kilograms.

The problem

“Workout was okay.” That’s all you get.

You wrote the programme. Then Maya says “workout was okay”. Did she hit the weights? Skip a set? Did her knee bother her? The answer is in a voice note, a chat, or nowhere. So the next change gets decided from memory.

FitOS puts it side by side. What you set, what was recorded, and what to do next, with the reason. Nothing is sent unless you send it.

The plan is what should happen. FitOS shows what did.

An illustrated scene. Dana, a trainer, puzzles over a vague message that says “Workout was okay”, while her client’s plan and what was actually done sit far apart.

Transcript

Every programme starts with a plan. But real life rarely follows the plan exactly. A late meeting. A crowded gym. A difficult exercise. A weight that did not feel right. The client adapts. But the trainer may never see the full picture.

FitOS keeps the plan and the actual workout separate. The trainer sets the programme. The client records what really happened. The trainer reviews it, responds, and makes the next step clearer.

Less guessing. Better conversations. More useful coaching. FitOS. Know what actually happened, and make the next step easier.

01

See what really happened, set by set.

Your client logs each set on one simple screen: reps done, load used, or skip with a reason. You see it next to what you planned. Anything not logged says “Not recorded”, never “missed”.

The client’s workout screen: target 10 reps at 16 kilograms, with fields for reps completed and load used, and a Skip set button.

02

A suggested next step, with the rules in plain sight.

  • Sleep and energy low across the week: ease the next session.
  • Quiet for 5 days: a friendly check-in.
  • Same load for three sessions: a small step up, about 10% at most.
  • A pain report: straight to the top, and no “go heavier” until you reply.

Every suggestion shows what it is based on, with a note already written. Send it, edit it or hold it. You always decide.

A suggestion for Luca: across four check-ins sleep 2.3 out of 5, with a ready-written message the coach can send as written or change.

03

One short list of who needs you.

Open FitOS and see who needs you today: a pain report, a low-recovery week, someone gone quiet, a workout to review. A short list, not a wall of charts. FitOS doesn’t diagnose pain. It makes sure you see it first.

The coach’s Clients screen: four people need you today, with the reason for each.

Already on Trainerize, TrueCoach or a spreadsheet?

  • Use it alongside. FitOS does one job: planned next to actual, plus a suggested next step. Keep your current tool or WhatsApp for everything else.
  • Start small. Try it with two or three clients for two weeks. There is no import yet, so you won’t re-enter your whole business.
  • Leave any time. Download any client’s record as a spreadsheet whenever you like.
An athlete training in a dim, industrial gym.

For your clients

Open the link. Tap Start. Done.

Nothing to download. Today shows one thing to do, with big buttons and plain words, and a text-size setting. Clients join through your personal link, so every client has you behind them. Each client sees only their own records.

Beta

Try it with two or three clients.

Free while we test. Tell us what’s missing and what’s confusing. You’ll hear back from the person who builds it.

Built in Singapore by a founder working with coaches to test it. It’s early, the rules are simple, and your feedback shapes them.

Free during the beta · Download or delete your data any time · Clear consent before anyone starts

Join the beta

Places are limited while we test. If they’re full, check back soon.

Questions

Good to know.

Does FitOS tell me what to do?

No. It suggests, with the reason, and you decide. The rules are listed above and they are a starting point, not a replacement for your judgement. FitOS can’t judge pain and is not medical advice: a reported pain goes to the top of your list and “go heavier” pauses until you reply.

Is it free?

Yes, the beta is free for coaches. If pricing ever changes, we will tell you clearly and give you notice first.

Do my clients need to install anything?

No. It works in the browser on any phone or computer.

Can I take my data with me?

Yes. Download any client’s record as a spreadsheet or a full file whenever you like.

Who can see my clients’ data?

You, the client, and the people the client’s account is set up with. Clients never see each other’s records. Read the full privacy terms inside the app.