Flags for you
- Weight trending above the range for a lean bulk block.
- Reports sleeping under 6 h for the third week.
Sunday night.38 check-ins.
Each one: three photos, a form,and a week of numbers.
One lands.Three photos, already read.
Not a photo. A measurement.Shoulders, hips, knees, ankles.
Week to week, nothing changes.Across months, everything does.
You read it. You decide.Nothing reaches a client until you do.
Check-in operations for physique coaches
Done before dinner.
CheckerFit reads the photos, recalculates the macros, adjusts the loads and drafts both reports — then stops and waits for you. Nothing reaches a client until you approve it.
Private beta · Enrollment open until December 15 · No Discord needed · Illustration · not a real client
What’s new
Built in public. Shipped weekly.
The web version of CheckerFit is being built in the open. Here is what already works and what comes next.
- Coming
The CheckerFit app, on iPhone and Android.
One app for coaches and clients: check-ins with a guided camera, plan, progress, reports and chat. Reaching the stores in the coming days.
- Coming
CheckerFit BodyMesh.
A photo shows how you look today. It doesn’t show what you’re becoming. BodyMesh will map your body, line by line, and measure it against yourself week after week, whatever the light, the angle or the distance. The change the mirror can’t see will finally take shape.
- Coming
OZUN by CheckerFit.
Every athlete has had a witness: the mirror, the coach, the camera. None of them saw everything. OZUN will. Every rep, every angle, every millimeter of movement. The eye that never blinks is waking up.
- Live
Gym and training, always current.
Change a client’s gym or equipment and CheckerFit tells you which exercises they can no longer do. Rebuild the training with one click, without waiting for a check-in; it reaches them with your next approval.
- Live
Profiles that change with the client.
Edit goal, schedule, meals and restrictions. Recalculate macros with a preview before saving.
- Live
A meal prep that respects what the client can’t eat.
Checked against their allergies, swaps foods only when needed and lets you lock the ones you want, always adding up exactly to the macros.
- Live
“This week”.
The week’s plan on the client dashboard and in your console, with a short video of every exercise.
- Live
Privacy first.
Fully pixelated faces, photos only through checkerfit.com, consent before any health data, and clients who delete their account whenever they want.
- Live
Every client in their own language.
Reports, notices and emails in each client’s language, even if your account uses another.
The arithmetic
Coaching doesn’t stop scaling because you run out of clients. It stops because you run out of Sundays.
Every check-in is the same loop: open the photos, compare them to last time, recalculate the numbers, adjust the loads, rewrite the meal plan, and write it up twice — once in plain language for the client, once honestly for yourself.
Say a careful check-in takes you twenty minutes by hand. Use your own number.
At 30 clients, that is ten hours every week, before a single conversation.
The client you don’t take on, because the week has already run out of room.
The pipeline
Four stages. You own the last one.
Your client submits, the pipeline runs, and the work lands in your queue as a draft — usually within minutes.
The client submits
Three poses — front, side, back — plus weight, adherence and how the week went. They do it in their CheckerFit space or the app, from their phone.
The photos get read
A written read of each pose and a status light — green, yellow or red — against the goal set for this block. Before analysis, every face it detects is pixelated irreversibly.
The plan recalculates
Calories move on the bodyweight trend, not on a guess. Loads move on the effort your client reported. Meal portions are computed from USDA data to land within 3 g of each macro target.
You decide
The draft lands in your review channel. Approve it, request changes and get a rewrite, or reject it for a fresh analysis. Nothing moves without you.
Where the line sits
It drafts. You sign.
You are the one your client hired, and you are the one on the hook for what reaches them. So the approval step isn’t a setting you can switch off — it’s how the thing is built.
Your method, not a default
Preferred split, weekly frequency, lifts you ban, lifts you always program, your cardio policy and how you handle progression. The plans come out looking like yours.
Numbers that aren’t guessed
Calories and macros come from Mifflin-St Jeor. The AI never sets them. Meal portions are calculated from USDA nutrition data, and a plan that misses its targets doesn’t go out.
Two reports, one of them private
Your client gets the plain-language report. You get the blunt one, with the raw read and the flags, plus a copy of what your client received. Both are password-protected.
The comparison engineLive · you release each one
The comparison your client can’t see in the mirror.
Week to week, nothing changes. Across months, everything does — but only if the two photos are actually comparable. The comparison engine anchors the pair, builds one composite and reads it as one image. It runs every month on its own, and whenever you ask for one.
- Deterministic pairing. The baseline and the latest comparable photo are picked by rules, matched pose to pose. No model decides which photos to compare.
- Fixed reference lines. The same four lines cross both panels. If they land in different places, the camera moved — and you see that it moved, instead of reading it as progress.
- Framing first. If the two photos aren’t comparable, it says so and doesn’t describe progress.
- Every month, then you decide. On the 1st, each client’s previous month (and each quarter) is compared with the numbers that go with it — weight, adherence, check-ins. It waits in your console until you release it.
Reference lines R1–R4 are fixed. Misalignment across panels means the camera framing changed, not the physique. · Schematic — illustrates the layout, not a client.
Straight answers
Before you join the beta
Is CheckerFit an AI coach?
No. You are the coach. The AI reads the photos and drafts the reports; the numbers are calculated; you review and approve everything before your client sees it. Your clients are told AI is part of the process.
Do I have to accept what the analysis says?
No. Every report lands in your review channel as a draft. Approve it, request changes and get a rewrite, or reject it and the check-in is analyzed again. Nothing reaches a client without your approval.
How are the macros calculated?
With Mifflin-St Jeor, in code. The AI never estimates or adjusts macros. Meal portions are then computed from USDA FoodData Central values so each plan lands within 3 g of every macro target.
Do I need Discord?
No. Everything happens on checkerfit.com: check-ins, reports and the chat between coach and client. Discord is optional, for coaches and clients who also want the notices there.
Can my clients get their reports in Spanish?
Yes. You choose English or Spanish once, when you set up your account, and all your clients get the product in that language. The choice is permanent for that account.
Does it give advice on supplements, hormones or medication?
No. CheckerFit never gives hormone or drug dosing, to you or to your clients. Questions like that are left to you.
Who can use CheckerFit?
Adults only. Coaches and clients must be 18 or older, and a date of birth is required at signup.
What does the AI cost me on top of the subscription?
Nothing. Analysis, calibration and reports are included in the seat price, with no metered usage.
Join the beta
Join the CheckerFit beta.
Enrollment is open until December 15, 2026. Tell us who you are and we answer by email. No Discord needed.
Get your Sunday back
Run your next check-in through it.
Bring one client, one week. If the draft that lands in your queue isn’t something you’d have been glad to write yourself, you’ve lost a few minutes.