Built for trainers and gymsFor trainers and gyms
The all-in-one platform to train, track, and grow your business.
Trusted by 10,000+ personal trainers & gyms across 20+ countries
WHO IT'S FOR
If you coach clients and want to professionalize your service, stand out from the competition and grow without losing the personal touch, Kaizer is for you.
Move from spreadsheets and WhatsApp to one platform — without losing the face-to-face relationship.
Clients, routines and tracking, together
Routines, videos, chat and tracking in your client's app, wherever you are.
Your branded app for every client
Go from 10 to 200 clients at the same quality, without working twice as hard.
Automations that protect quality
Stop jumping between spreadsheets, WhatsApp and scattered apps. Kaizer brings your operation together and AI handles the repetitive work.
Creale una rutina de push pull legs a Juan
Everything you can do in Kaizer, you can now run with words alone, thanks to the Assistant.
Spot patterns, catch risks and celebrate wins, with the next step always one click away.
Your Kaizer access includes the marketplace, where +10,000 users look for a trainer every month.
Just by using Kaizer, all your clients unlock perks across hundreds of fitness, wellness and health brands. They win and thank you for it; we handle it.
COMPARISON
Compare your current workflow with what changes when you use Kaizer.
RESULTS
It's not just software — it's time you get back and clients who stay.
−50%
You see who's about to leave before you lose them, not after.
At-risk alerts
15 hrs
Everything in one place, no jumping between apps or spreadsheets. AI adds the speed.
All-in-one platform
47 s
A personalized, science-based routine ready in seconds.
AI-assisted builder
BEFORE YOU START
No. Start with whoever you want and add the rest at your own pace.
Under 10 minutes. It's free up to 3 clients and needs no card.
You replace it gradually — chat and tracking live in your client's app.
If you use WhatsApp and a spreadsheet, you can use Kaizer. We built it so the technology adapts to you — not the other way around.
Free up to 3 clientsNo card requiredMigrate in minutesCancel anytime
FAQ
Kaizer is an AI-native fitness coaching platform for personal trainers, built in Buenos Aires by Agustín Anfosso. Unlike Trainerize, Harbiz or TrueCoach — where routines stay static for weeks — Kaizer generates the initial routine from each client's goals, preferences and available equipment, and then automatically adjusts weights and reps after every session the client logs. Used today by 10,000+ trainers across 20+ countries.
Trainerize, Harbiz and TrueCoach generate static routines: the plan stays until the coach manually replaces it. Kaizer recalculates the estimated 1RM (using NSCA tables) after every workout the client logs, and updates the target weights and reps of upcoming sessions automatically. It's also natively built for LATAM (Spanish-first, prices shown in USD and charged in pesos) and shipped in English and Portuguese too.
No. The AI accelerates your judgment by proposing adjustments grounded in client data, but you approve, edit or reject them before they reach the client. There's a toggle for whether weight progression runs unattended or stays as a suggestion. The coach-client relationship is what drives retention — Kaizer exists so that relationship is sustainable at 50, 100 or 200 clients without burning you out. And if you don't want it, you can turn it off completely anytime.
Today Kaizer is focused on personal trainers: individual routines that adapt after every session, a client dashboard, and a mobile app for your clients. The gym model — white-label app, multi-coach dashboard and MAU-based pricing (per monthly active member) — is on our roadmap, not available yet. If you run a gym and you're interested, write us at support@kaizer.app.
Free plan forever, up to 3 clients, no credit card required. Above that: Starter, Pro and Unlimited for individual coaches based on client volume. All paid tiers include the automatic weight and rep adaptation engine. A gym tier with a white-label app is on the roadmap. Current pricing on kaizer.app/en/pricing.
Yes — your clients use the Kaizer mobile app (iOS and Android) to view routines, log workouts, upload metrics and chat with you. It's free for them. On higher tiers the app ships under your brand, not as Kaizer.
