Coming soon · gymk.ai
Coaching, amplified.
The AI-first platform where coaches build training and nutrition plans in minutes — and the people they train actually follow them. Kai drafts. You approve. Nobody gets replaced.
Free to use. AI is the paid part. Founder members lock half price for life.
- Offline-first
- iOS & Android at beta
- Kai, human-approved
Active students
Plan adherence
Sessions this week
Weekly volume
Your students
This week
- Valentina R.
Valentina R.
Strength · week 3
92%
- Mateo C.
Mateo C.
Push/Pull/Legs · week 5
78%
- Camila T.
Camila T.
Recomp · week 2
41%
Kai is drafting
Mateo · block 4
Join before we launch. Keep the price forever.
The people who sign up now are the first cohort. That is worth something concrete, so here is exactly what it is worth:
Plus or Pro at 50% off — locked for life, not for a first year.
Beta access before the public launch, on web and on the app.
A founder badge in every community you join.
A real say in the roadmap. We read every answer to the question below.
Built for coaches
Your method, at ten times the reach.
GymKai does not coach for you. It removes the four hours a week you spend rebuilding spreadsheets, chasing check-ins and retyping the same plan for the sixth client.
AI plan builder
Write one brief — "8-week strength block for Mateo, four days, squat 140 kg". Kai reads his history, reasons through six steps, and hands back an editable draft. You approve and assign; nothing reaches a student unsigned.
Students & telemetry
One row per person: adherence, the current block, last session, body-weight trend, sleep and resting heart rate from Apple Health or Garmin. When someone misses three of four sessions, the roster says so before they do.
Your subdomain & app group
Claim a handle and your community lives at handle.gymk.ai — a feed, an invite link and an app group that carries your name instead of ours.
Direct chat
One thread per athlete plus the group, with read receipts. Written offline, it queues on the device and sends itself the moment there is signal.
Goals, milestones & challenges
Daily and weekly targets per athlete, milestones for someone coming back from injury, and a challenge with a live leaderboard for the whole community.
Your own food database
Your recipes and local products beside the public database, with the 4/4/9 arithmetic checked as you type. Arepas included — a Colombian nutrition plan needs them.
What that means in practice
becomes a full 8-week block, ready to edit
logs and messages are kept on the device, then sync
Apple Health, Google Health, Fitbit, Garmin
From the private preview — design partners, quoted with permission
I spend Sunday afternoons rebuilding the same four blocks in a spreadsheet. If that becomes twenty minutes, that is my weekend back.
My clients do not want another app. They want me to notice when they stop logging. Show me that and I will move everyone over.
Built for athletes
A coach in your pocket. A real one, plus Kai.
Connect to your coach, get their plan, and log the work as you do it — set by set, meal by meal, with or without signal.
Training companion
Weight, reps and RPE per set, a rest timer that runs while you put the bar down, and a PR flagged the moment you beat it. It reads like a notebook, not a form.
Nutrition against the plan
Four rings — calories, protein, carbs, fat — against the targets your coach set. 2 200 kcal and 180 g of protein today; add the planned meal in one tap.
Wearables, synced
Apple Health, Google Health, Fitbit and Garmin feed weight, sleep, steps and resting heart rate in, so your coach sees the week you actually had.
Your coach, connected
Their plan, their thread, their read receipt. Your logs sit right there in the conversation, so "how did Tuesday go?" already has an answer.
Community & challenges
Your coach's feed at their own address, the group you train with, and a leaderboard on challenges you can actually win.
Kai plans on Plus
No coach yet? Write a brief, read the draft, and train on it — then send it to your coach for approval the day you find one.
Syncs with what you already wear
- Apple Health & Fitness
- Google Health
- Fitbit
- Garmin
Names for reference only. No affiliation or endorsement implied.
Meet Kai
An assistant that drafts. A human who decides.
Kai reads the history, proposes the block, and stops. Every plan waits for a coach’s approval before an athlete ever sees it — that is a product rule, not a setting.
Asked for Mateo’s next block, Kai works like this
- Reading 4 weeks of Mateo’s logs
- Choosing a strength block over hypertrophy
- Balancing weekly volume per muscle group
- Writing week 1 — squat 4 × 5 at 110 kg
- Flagging the bench plateau since week 2
- Ready for your approval
Human in the loop, by construction
Kai never publishes. It never messages your athletes. It never changes a plan a coach signed. The point is not to replace the person your athletes trust — it is to give that person back their Sunday.
Every draft is a draft until a coach approves it.
Every edit a coach makes teaches Kai that coach’s method.
A coach can turn Kai off entirely and keep the whole product.
What Kai does
Drafts training and nutrition plans from a one-line brief
Spots who needs attention before they message you
Summarizes the week — who trained, who slipped, what changed
Writes the check-in message, in your voice, for you to send
Suggests a deload when the numbers stop moving
Answers "what is my session today?" for the athlete
How it works
Three steps. Then it is just training.
Invite your students
Claim your handle, share one link, and your athletes land in your community with your name on it.
Brief Kai
One line about the athlete and the goal. Kai drafts the block; you edit anything you disagree with.
Approve & track
Approve the plan and the week comes back to you: adherence, load, telemetry, and who to call.
Everywhere you train
The gym has no signal. The app does not care.
GymKai is offline-first and mobile-first. The dashboard opens and works with no connection, and everything you log syncs the moment you have one — because the set you just did is not worth losing to a basement.
Sets, meals and messages are written to the device first, and sync themselves when the signal comes back.
Installable from the web today — it opens straight into your dashboard, no store required.
Native iOS & Android, built with Expo, lands with the first beta: live Apple Health and Google Health sync, and push reminders.
Pricing
The product is free. The AI is what you pay for.
Coaching, plans, chat, community and tracking cost nothing. Kai is the paid part — and founder members pay half of it, for life.
Draft pricing. These are the numbers we intend to launch with, not numbers anyone has been charged — the final ones land at launch.
Free
Everyone
The whole product, minus the AI.
Connect to your coach and follow their plan
Set-by-set logging, rest timer, PR detection
Nutrition log against your coach’s targets
Direct chat and your coach’s community
Wearable sync and an offline-first dashboard
Plus
Athletes
Kai writes your plan when no coach has.
Everything in Free
Kai drafts your training and nutrition plans
The Kai companion: "what is my session today?"
Advanced progress insights and trend detection
Send any Kai draft to a coach for approval
Pro
Coaches
The plan builder, the community, the telemetry.
Per tracked student: from $1.00/month
Draft amount. Charged only once your community is live.
Everything in Plus
The Kai plan builder: brief → draft → approve & assign
Roster analytics, telemetry and missed-session alerts
Your own subdomain, feed and app group
Goals, milestones and community challenges
Your own food database beside the public one
Founder members lock 50% off Plus and Pro. For life, not for a year.
What a founder member gets
50% off Plus or Pro, for life
Beta access before the public launch
A founder badge in every community
A vote on what we build next
Questions
The things you would ask us first.
Everything that is not AI is free, for both sides: connecting to a coach, following a plan, logging sets and meals, chat, community, goals, wearable sync and the offline dashboard. What you pay for is Kai — Plus for athletes, Pro for coaches. Coaches also pay a small monthly fee per tracked student once their community is live; that amount is still being decided, which is why the table says "from".
You give Kai a one-line brief. It reads the athlete’s logs, picks a block, balances weekly volume per muscle group, writes the weeks and stops — the draft sits in the builder marked "ready for your approval". A coach approves, edits or throws it out. Nothing reaches an athlete without a human signing it, Kai never messages your athletes, and a coach can switch it off entirely and keep every other feature.
You keep training. Sets, meals, body weight and messages are written to your device first and queue there; the moment you have a connection they sync, and your coach sees them in order. A queued message is labelled as queued rather than pretending it was sent.
Apple Health & Fitness, Google Health, Fitbit and Garmin at launch. They feed body weight, sleep, steps, workouts and resting heart rate into your progress screen and, if you are connected to a coach, into their roster. Live two-way sync with Apple Health and Google Health arrives with the native app at beta. If yours is missing, tell us in the founder form.
You do, and you can export it. Health telemetry is read only with your permission and is visible to you and to the coach you connect to — nobody else, and never a third party for advertising. Right now nothing you type on this page is transmitted anywhere: the founder list runs entirely in your browser during this pre-launch preview and forgets on reload.
Claim a handle and your community lives at handle.gymk.ai — say valentina.gymk.ai. That is your public page, your feed, your invite link and the app group your athletes join. Your name is on it, not ours, and the handle stays yours.
The web app is offline-first and installable today; it opens straight into your dashboard. A fully native iOS and Android app, built with Expo, ships with the first beta and shares your account and your data with the web — that is when live Apple Health and Google Health sync and push reminders arrive. We are not going to invent a date to make this page look urgent; founder members hear it first.
Plus or Pro at 50% off, locked for life rather than for a first year. Beta access before the public launch. A founder badge in every community you join. And a vote on the roadmap — we read every answer to "what would you want Kai to do first?" and it changes the order we build in.
Last thing
Be one of the first. Pay half of it, forever.
One email address is the whole commitment. No account, no card, no queue number we made up — just the founder price locked from your first day, and the beta before everyone else.