What is Kaizer?
Kaizer is the all-in-one platform for trainers: it brings programming, tracking, chat and billing into one tool. Build routines by hand, reuse them, or let the AI draft the first version; when you turn it on, it adjusts weights and reps after every logged session using sets, RIR and estimated 1RM. The AI is one tool. The final word is always yours.
How loads adapt, in three steps.
Kaizer reads what the client logged, recalculates their estimated 1RM, and updates the loads of upcoming sessions.
Set logged.
The client logs exercises, sets, reps, loads and RIR from the mobile app.
1RM recalculation.
The engine recalculates estimated 1RM with NSCA-derived tables using sets, reps and RIR.
Worked out from what they logged last session
Updated plan.
Kaizer writes the loads for the coming weeks. Any week you edit by hand, it leaves alone from then on.
After each logged session, Kaizer uses sets, reps, RIR and estimated 1RM to work out the next loads. You can turn it on for all your clients or just some.
How Kaizer got here.
From a personal frustration to a platform running across 20+ countries.
Founded in Buenos Aires.
Agustín Anfosso, Pedro Guarga and Octavio Serpe found Kaizer with a focus on technology for personal trainers.
Public metrics begin.
Since this date, Kaizer measures its public trainer, routine, country, and exercise figures.
1200+ trainers and 150k+ routines.
Kaizer operates in 20+ countries and offers a library of 1500+ exercises.
International product and support.
Available in Spanish, English, and Portuguese, with global support and a dedicated team for Latin America.
Who Kaizer is for.
For coaches who want to centralize programming, tracking and billing without going back to spreadsheets.
- Independent trainers.Moving off Excel and WhatsApp, looking for a single dashboard for everything.
- 100% online coaches.Programming, logs, tracking and communication in one connected workflow.
- Hybrid coaches.In-person sessions + digital programming in one single dashboard.
- Coaches with multiple clients.One central view for routines, logs and tracking signals.
If you run a gym, box or studio, Kaizer has a version for your staff, members and classes, with your gym's brand in the members' app: Kaizer for Gyms
See why coaches choose Kaizer.
What people ask us most.
What Kaizer does.5
Both. Trainers use the platform to manage clients, program routines and track progress. Clients use the Kaizer app on iOS or Android to view routines, log workouts and communicate with their coach.
Kaizer combines programming, tracking, chat and a client app with load adaptation after each logged session. To contrast other platforms' features, use the comparison pages with sources and review dates.
No, and that's intentional. Progression adjusts upcoming sessions from client data. The coach can edit any week or switch it off globally or for one client.
Yes. Kaizer works out each client's daily target with the Mifflin-St Jeor formula, builds the meal plan from recipes and ingredients and adds up the calories and macros of every meal; your client sees the plan in their app. It doesn't diagnose, build diets to treat medical conditions or recommend supplements.
Yes. The client-facing mobile app ships on iOS ("Kaizer: Gym & Fitness Planner" on the App Store) and Android (`app.kaizer.kaizer` on Google Play). Trainers work primarily from the web dashboard.
Plans, billing and coverage.3
Basic costs USD 5 for up to 3 clients; Starter, USD 19/month for up to 15; Pro, USD 49/month for up to 50; and Arnold, USD 149/month for up to 500. Unlimited is quoted to fit. Annual equivalents are published on the pricing page.
Kaizer operates globally and in 20+ countries. Public markets are Latin America, the United States, Canada, Spain and Portugal.
Go to kaizer.app, click 'Start free' and create an account. You can begin with the USD 5 Basic plan for up to 3 clients.
Who we are.2
Kaizer was founded in 2024 in Buenos Aires by three founders: Agustín Anfosso (CEO; former pro basketball player who worked at tech companies Scale AI and Invisible Technologies, focused on AI since 2020), Pedro Guarga (COO & Head of AI) and Octavio Serpe (CTO; ITBA engineer, formerly at Mercado Libre).
1200+ trainers across 20+ countries, generating 120k+ adaptive routines.
