COMPARISON

Kaizer vs TrainerStudio.

Up-to-date comparison between Kaizer and TrainerStudio: adaptive AI, retention, language, white-label app, nutrition and price. Honest about where each one wins — both are strong in Spanish.

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QUICK ANSWER

In one sentence.

TrainerStudio and Kaizer both work great in Spanish for trainers — the language is at parity, so that's not the difference. TrainerStudio is a solid product built in Spain: trainer panel and client app in real Spanish, white-label app included on every paid plan, nutrition with macros, and a generous free tier (3 clients). Kaizer wins elsewhere: its AI doesn't just generate the routine, it re-programs it itself after every session the client logs — recalculating estimated 1RM via NSCA tables and adjusting weights and reps. TrainerStudio's AI is an assistant that generates a first draft and nothing more; you adjust everything after by hand. Add measured retention (-50% churn / 92% retention, 15 hrs/week saved) and billing in pesos vs its EUR + VAT ladder. The AI is optional — turn it off anytime; you keep the final say.

COMPARISON MATRIX

Side by side.

TrainerStudioKaizerAdaptive AINo — the AI generates a first draft; you adjust everything after by handYes — re-progresses weights and reps after every logged session (sets, RIR, estimated 1RM)Measured retentionPassive progress tracking (notifies when a client trains), no published retention metric-50% churn (92% retention), 15 hrs/week savedLanguageNative Spanish (Spain) + English — at parity with KaizerFull Spanish support (Rioplatense + neutral) + EnglishLocal-currency billingPriced in EUR, VAT added — built for the Spanish marketPriced in USD, charged in pesos (team in Buenos Aires)NutritionYes, includes nutrition plans with automatic macro calculationOut of scope — training/programming onlyWhite-label appIncluded in every paid plan at no extra costIncluded in ProFree planFree forever up to 3 clients, no card — at parityFree forever up to 3 clients, no card

WHERE KAIZER WINS

Four reasons to pick Kaizer over TrainerStudio.

Each point ties back to a concrete limitation of the compared product.

The AI re-programs itself, not just the first draft.

TrainerStudio's own documentation says it plainly: its AI is designed as an assistant, not an autopilot — it generates suggestions you edit. It produces a first draft from your library and stops there; every adjustment after is manual. Kaizer takes every workout the client logs, recalculates the estimated 1RM via NSCA tables, and adjusts the weights and reps of upcoming sessions automatically. You choose whether it runs unattended or as a suggestion to approve. The difference between 'I used AI once' and 'the routine adapts itself to the client's real performance'.

Retention you can measure, not a passive ping.

TrainerStudio's 'automatic tracking' is passive: it notifies you when a client trains. Useful, but it doesn't move the needle on its own. Kaizer leads with measured outcomes — -50% churn (92% retention) and 15 hrs/week saved — because automatic adaptation keeps plans alive and clients progressing. Fewer plateaus, better adherence, higher retention.

Priced in USD, charged in pesos — built for LATAM.

TrainerStudio runs a EUR ladder (€19 to €149) with VAT on top, built for the Spanish market. For a coach who bills in pesos, that's FX friction on every renewal. Kaizer shows prices in USD so they stay clear and stable, and charges in pesos: team in Buenos Aires, local billing. Language is at parity; what changes is the currency and LATAM presence.

WHERE TRAINERSTUDIO WINS

Where TrainerStudio still wins.

TrainerStudio is a genuinely strong Spanish-language competitor and wins on several real fronts. It is built in Spain end to end: the panel and client app are native Spanish (no machine translation) with WhatsApp support (+34), so on language experience it is at parity with Kaizer — not behind. It includes a white-label client app on every paid plan at no extra cost, something many rivals charge an expensive add-on for. Its EUR pricing is simple and cheap for the Spanish market (free to 3 clients, starts at €19, no lock-in). And it ships nutrition with automatic macro calculation — a category Kaizer deliberately does not do (training only). For a Spain-based coach who wants an all-in-one (training + nutrition + white-label app) in their own language at a low EUR price, TrainerStudio is a legitimately good fit. Kaizer's edge is specific: AI that re-programs itself after every session, measured retention, and billing in pesos — not language or feature breadth.

MIGRATION

How to migrate from TrainerStudio to Kaizer in under 48 hours.

You already work in Spanish with a block builder, profiles and check-ins — all of which map 1:1 to Kaizer. You're not migrating to gain Spanish (you already have it): you're migrating to add adaptive AI. Our team handles the whole migration for you in under 48 hours.

Book a 15-minute call.

STEP

Give us access to your current tool.

STEP

We migrate clients, routines and history for you.

STEP

Turn on automatic adaptation and review — all in under 48 hours.

STEP

We handle the migration for you, in under 48 hours.

Our team migrates your clients, routines and history for you. No CSV exports, nothing to upload by hand. Zero downtime for your clients.

Not in the same way. TrainerStudio's AI is an assistant that generates a first routine draft from your library — its own documentation says it's designed as an assistant, not an autopilot, generating suggestions you edit. Once the draft is generated, adjustments after are manual. Its 'automatic tracking' is passive: it notifies you when a client trains, it doesn't recalculate loads. Kaizer re-progresses weights and reps automatically after every session the client logs, recalculating estimated 1RM via NSCA tables; you approve or let it run unattended.

Both work great in Spanish, no machine translation — here they're at parity. TrainerStudio is built in Spain (trainer panel and client app in real Spanish, WhatsApp support +34) and has an English version. Kaizer has a team in Buenos Aires, Rioplatense and neutral Spanish, plus English. Language is not the deciding factor between these two tools: the real difference is adaptive AI, measured retention, and billing in pesos vs EUR.

TrainerStudio has a free plan up to 3 clients and then a EUR ladder (around €19/mo for 5 clients, up to €149/mo unlimited), with VAT on top. The white-label app and nutrition come included on paid plans. Kaizer also has Free up to 3 clients, then Starter / Pro / Unlimited with adaptive AI included on all paid tiers, priced in USD and charged in pesos. Current pricing on kaizer.app/en/pricing.

Yes to both. TrainerStudio includes nutrition plans with automatic macro calculation and a white-label app (your own logo and colors) at no extra cost on all paid plans — two genuine strengths. Kaizer is deliberately training-only: we don't do nutrition or macros. The white-label app is included from the Pro plan. If your priority is an all-in-one with nutrition, TrainerStudio covers that better; if your priority is programming with AI that adapts itself, Kaizer.

You're not migrating for language — you already have it in both. You migrate to stop manually re-programming each client's next week. In TrainerStudio you generate a draft and then adjust everything by hand; in Kaizer the AI recalculates weights and reps automatically after every logged session (estimated 1RM via NSCA tables), with you approving. That turns re-programming time into review-and-publish, and protects retention (-50% churn). If you bill in pesos, it also removes the EUR + VAT friction.

May 2026. We review TrainerStudio's pricing, features and positioning quarterly. If you find anything out of date, write us at support@kaizer.app.

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