Comparison

Kaizer vs STRYON

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Kaizer

This AI-powered fitness planner creates hyper-personalized workout routines based on your goals, limitations, and available equipment. It intelligently adapts your training over time to ensure continuous progress and prevent burnout.

Highlights
  • AI-powered routine creation via natural language
  • Hyper-personalized plans based on user data
  • Smart progressive overload and weight updates
  • Exercise replacement suggestions
  • Professional coaching principles integrated
Features
Read full description

Kaizer is the app where you train with your trainer or your gym: your routine, your classes, the chat and your progress, all in one place. WITH YOUR GYM If your gym runs on Kaizer, you join with the link they share and see the app with their name, logo and color. Book your classes or keep a fixed spot, read your gym's news and train with the routine they assign you. WITH YOUR TRAINER Your trainer sends you your routines, follows your progress, adjusts whatever needs adjusting, chats with you and asks for form videos. All of it in one place, without leaning on three other apps. NO TRAINER YET? Browse the marketplace inside the app. Every profile shows how that coach works, their specialties and whether they train online, in person or both. Subscribe to the one that fits and they are notified the moment you join. YOUR SESSIONS, IN DETAIL Sets, reps, load, rest. Supersets, circuits and dropsets when your plan calls for them. Every exercise ships with an illustration of the muscle it works, so you know what you are aiming at before you lift. ASSISTED PROGRESSION Week over week, Kaizer writes the loads of your upcoming sessions from what you actually lifted. You always know what to do when you walk into the gym, and the weight on the bar keeps moving. SMART REPLACE Machine taken? A movement you cannot do today? Kaizer suggests alternatives that keep the point of the exercise intact, so swapping one leaves the rest of the plan standing. EVERYTHING IN ONE PLACE - Direct chat with your trainer: text, photos, files and voice notes - Nutrition plan with meals, recipes and macros, when your trainer sends one - Full training history, streaks and progress your trainer sees too - 1,500+ exercises with illustrations - Apple Health sync and Live Activities while you train - Rest timer that runs on your lock screen TRAINING ON YOUR OWN? You can also use Kaizer without a trainer. Describe what you want in plain language (four days a week, bad knees, dumbbells only) and Kaizer builds a complete structured program in seconds, and keeps adapting it as you log your work. Kaizer works in Spanish, English and Portuguese, in 20+ countries. Terms of Service: https://kaizer.app/en/terms-and-conditions Privacy Policy: https://kaizer.app/en/privacy-policy

About

STRYON

Track your strength training progress with detailed logs, personalized routines, and performance analytics. Discover your strength rank for each exercise and visualize your evolution with historical data and personal records.

Highlights
  • Log sets, reps, and weight
  • Create custom workout routines
  • Exercise-specific strength ranking
  • Workout history and personal records
  • Extensive exercise library with instructions
  • Rest timers and progress rewards
Features
Read full description

STRYON turns strength training into progress you can see. Log every set, follow your routines, and discover how your performance evolves across individual exercises. Every workout moves you forward. TRAIN WITH PURPOSE Create routines that match your goals, equipment, schedule, and experience. Keep every set, rep, and weight organized while you train. EARN YOUR RANK See a strength rank for each supported exercise. STRYON evaluates the exercise, your performance, and your profile, so a bench press is never judged like a lateral raise. SEE REAL PROGRESS Review your workout history, personal records, estimated one-rep max, training volume, streaks, and performance trends. LEARN EVERY MOVEMENT Explore an extensive exercise library with targeted muscles, clear instructions, and animated movement references. BUILD CONSISTENCY Rest timers, reminders, goals, XP, and rewards help make every session count. Whether you are starting your first routine or chasing your next personal record, STRYON gives every workout a clear sense of progress. Some features require a STRYON Pro subscription. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current billing period. You can manage or cancel your subscription in your App Store account settings. Privacy Policy: https://getstryon.com/privacy Terms of Use: https://getstryon.com/terms

Screenshots

Kaizer4 screens
STRYON4 screens

Verdict

The call

The clearest difference is update cadence: STRYON at every 3 days against Kaizer's every 8 days. Kaizer's advantage is ratings volume (9 vs 1). On price, rating, review sentiment and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Kaizer sells 11 in-app purchases, starting at $3.99 per 7 days and STRYON sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Kaizer against 5.0 for STRYON. That said, the two scores are not equally well evidenced: Kaizer has 9 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Kaizer ships an update every 8 days, STRYON every 3 days. The most recent releases landed on October 24, 2026 and October 8, 2026 respectively.

Scorecard2 real differences · 8 level
Kaizer versus STRYON: the parameters behind the verdict, then further details
ParameterKaizerSTRYON
PriceFreeFree
Rating5.0 (9 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings9 — better1
Update frequencyEvery 8 daysEvery 3 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.415.0 — better
Further details — not scored
Size109 MB186 MB
Age rating4+4+
DeveloperKAIZERAnny Fischer

Customer experience

Kaizer

All ratings9 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

STRYON

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

11 purchases

Kaizer

Subscriptions10
  • Pro Weekly3 Days trial$3.997 Days
  • Pro Monthly3 Days trial$8.991 Month
  • Trainer Plan — $39.99$39.991 Month
Show 7 more
  • Pro Yearly7 Days trial$39.991 Year
  • Trainer Plan — $59.99$59.991 Month
  • Trainer Plan — $79.99$79.991 Month
  • Trainer Plan — $99.99$99.991 Month
  • Trainer Plan — $109.99$109.991 Month
  • Trainer Plan — $129.99$129.991 Month
  • Trainer Plan — $159.99$159.991 Month
One-time1
  • Pro Lifetime$89.99
2 purchases

STRYON

Subscriptions2
  • STRYON Pro Monthly3 Days trial$5.991 Month
  • STRYON Pro Annual$22.991 Year

Questions

Is Kaizer free?
Kaizer is free to download, with in-app purchases available.
Is STRYON free?
STRYON is free to download, with in-app purchases available.
Which has better reviews, Kaizer or STRYON?
Kaizer and STRYON are both rated 5.0 out of 5 on the App Store, from 9 and 1 ratings respectively.
Do Kaizer or STRYON have ads?
Neither Kaizer nor STRYON shows ads.
Which is updated more often, Kaizer or STRYON?
Kaizer ships an update every 8 days, and STRYON every 3 days. Most recently, Kaizer was updated on October 24, 2026 and STRYON on October 8, 2026.

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