Comparison

kaizen | Adaptive Run Training vs Gym Rank

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

Head to head
About

kaizen | Adaptive Run Training

This app uses your running history to calculate your current fitness and set dynamic weekly distance targets. It offers personalized training guidance to help you achieve your running goals, whether for a specific race or general improvement. The app provides race predictions and flexible training plans that adapt to your schedule.

Highlights
  • Data-driven training partner
  • Dynamic weekly distance targets
  • Personalized fitness calculations
  • Race predictions for various distances
  • Flexible training plans
  • Build consistency and improve fitness
Features
Read full description

kaizen is load-based run training for committed runners, starting with the running you have already done. Connect Strava, Garmin or Apple Health so kaizen can analyse your training and race history. See how your fitness is developing, what shape you are in now and what your training suggests is possible. kaizen then connects that picture with your goal and timeline to map the weekly training load needed ahead. kaizen does not process or store location data. Train toward a 5K, 10K, half marathon or marathon—or set a rate of improvement without an upcoming race. CHOOSE HOW YOU TRAIN Use a suggested training structure or build the week yourself: • Even Spread for a calm, repeatable weekly rhythm • 1 Long, 1 Hard to anchor the week around one longer run and one harder effort • Build Your Own for complete control over the week Choose structured workouts, plan your runs and see how each session contributes to your weekly target. ADAPT AS YOU GO Move or edit sessions when the week changes. Every completed run recalculates both your current fitness and the training load needed ahead. HOW LOAD WORKS Equal distances do not always represent equal training. kaizen uses distance, pace and elevation—along with supported cross-training minutes—to understand the load created by different activities. This keeps the bigger picture consistent while giving you control over how the work gets done. Start with a seven-day free trial. Terms: https://runkaizen.com/terms Privacy: https://runkaizen.com/privacy

About

Gym Rank

This AI-powered fitness app helps users track workouts, set personal records, and improve strength. It offers daily challenges, a unique ranking system, and AI-driven progress insights. Users can access a large exercise library with demo GIFs and create custom workout programs.

Highlights
  • Track workouts and personal records
  • Join daily fitness challenges
  • AI-based progress insights
  • 1400+ exercises with demo GIFs
  • Create and share workout programs
  • Offline mode
Features
Read full description

Gym Rank turns every set you log into a percentile strength rank, cross-referenced against millions of lifts from lifters worldwide. Join 30,000+ ranked lifters in 165 countries. Log a set, see your rank, and get a live target for the next one. 1,314 exercises, 160+ of them ranked. Formerly Kaizen Zone. YOUR STRENGTH LEVEL, MEASURED FOR REAL - A percentile rank for every lift and every muscle group, cross-referenced against millions of logged lifts - 160+ ranked exercises across barbell, dumbbell, machine and bodyweight - One overall rank for your whole body, plus a rank for each of nine muscle groups - Nine tiers with five divisions each, so there is always a next step - Scoring accounts for your bodyweight and age, so your number means something YOUR NEXT RANK, LIVE IN THE WORKOUT - Every exercise card shows the set that takes you to the next rank, in realistic reps - The tier bar fills as you log, so you know when one more rep counts - Top % highlights: a standout day or week earns a shout-out, like "top 6% of lifters who trained that day" - Complete sets right from the Live Activity on your Lock Screen A GYM LOG BUILT FOR SPEED - Log sets, reps and weight in two taps - 1,314 exercises with animated demos, and a picker with equipment, kettlebell and band filters - Swap any exercise mid-workout, with a suggested weight - Rest timers per exercise, a plate calculator and automatic personal record (PR) detection - An estimated one rep max (1RM) for every lift and a PR history that never forgets - Film your PR attempts and bring your history over from other workout apps - Works offline, no signal needed at the rack A ROADMAP TO YOUR NEXT RANK - Rank Roadmap: the exact reps and weight between you and your next rank, lift by lift - Quests built from the lift that holds your rank back, plus daily quests and Challenges - A Workout of the Day, proven programs like 5/3/1, or your own workout routines COMPETE AND SHARE - Weekly leagues against lifters at your level - Country and world leaderboards - Compare ranks and lifts with friends - Share your rank card to your Instagram story in two taps PROGRESS YOU CAN READ - A workout calendar, muscles-hit map and strength trends on your Profile - Bodyweight trend for bulking, cutting or maintaining, plus body measurements and private progress photos - Light and dark mode - Sync completed workouts to Apple Health Gym Rank speaks English, German, Spanish, French, Italian, Dutch and Portuguese. Log your first set and find out where you rank. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

kaizen | Adaptive Run Training4 screens
Gym Rank4 screens

Verdict

The call

The clearest difference is monetization model: Gym Rank at free with in-app purchases against kaizen | Adaptive Run Training's subscription. Gym Rank also leads on review sentiment (84% vs 58%) and ratings volume (171 vs 31). On price, rating, update cadence 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. kaizen | Adaptive Run Training sells 15 in-app purchases, starting at $12.99 per month and Gym Rank sells 8 in-app purchases, starting at $3.99 per 7 days. 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 — 4.7 for kaizen | Adaptive Run Training against 4.8 for Gym Rank. That said, the two scores are not equally well evidenced: Gym Rank has 171 ratings behind it against 31, so its average is the more settled of the two. Written reviews are what separate them: 58% of kaizen | Adaptive Run Training's written reviews are positive against 84% of Gym Rank's.

UpkeepUpdate frequency

kaizen | Adaptive Run Training ships an update every 10 days, Gym Rank every 2 weeks. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

Scorecard4 real differences · 6 level
kaizen | Adaptive Run Training versus Gym Rank: the parameters behind the verdict, then further details
Parameterkaizen | Adaptive Run TrainingGym Rank
PriceFreeFree
Rating4.7 (31 ratings)4.8 (171 ratings) — better
Positive reviews58.0% of reviews83.8% of reviews — better
Number of ratings31171 — better
Update frequencyEvery 10 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationSubscriptionFree with in-app purchases — better
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.415.0 — better
Further details — not scored
Size97 MB230 MB
Age rating4+12+
DeveloperRun Kaizen LTDKaizen Software Development

Customer experience

kaizen | Adaptive Run Training

All ratings29 ratings
Positive93.1%
Neutral0.0%
Negative6.9%
Written reviews88 reviews
Positive58.0%
Neutral13.6%
Negative28.4%

Gym Rank

All ratings171 ratings
Positive93.6%
Neutral3.5%
Negative2.9%
Written reviews37 reviews
Positive83.8%
Neutral8.1%
Negative8.1%

User reviews

kaizen | Adaptive Run Training

From 31 App Store ratings

What we love

  • ✨ Adaptive and flexible training
  • 🎯 Accurate race predictions
  • 📈 Helps with improvement and progress
  • 💡 Simple and effective concept
  • 🤝 Good customer support

Room to improve

  • 🐛 Very buggy and unstable
  • 📉 Inaccurate predictions sometimes
  • 🤔 Confusing to understand and use
  • 💰 Expensive subscription fee
  • ⏳ Lacks advanced features

Gym Rank

From 171 App Store ratings

What we love

  • 💡 Gamification based on Solo Leveling
  • 👍 Motivating and engaging workout experience
  • 👍 Provides different workout options to prevent boredom
  • 👍 Straightforward and helpful app
  • 🚀 Continuously improving and adding new features

Room to improve

  • 🐛 Toxic community on Discord with arguments and threats
  • 💡 Needs more ways to level up and progress

Bugs and requests

kaizen | Adaptive Run Training

Reported bugs

25 issues
  • Setup process crashes or loops
  • App crashes frequently
  • Mileage calculations are incorrect
  • Planned mileage doesn't add up correctly
  • App doesn't get past the first step
Show 20 more
  • Race prediction screen freezes
  • App doesn't work at all
  • Data imports incorrectly (mileage/pace)
  • Issues with unit conversion (miles/kilometers)
  • Subscription charge without reminder
  • Weekly targets change based on paces
  • Only shows one week ahead
  • Can't get past prediction screen
  • Stuck on loading stage
  • Imported Strava data is wonky
  • Race predictor only gives marathon distance prediction
  • Training days logged as previous day
  • Cannot control subscription
  • Inconsistent distance recommendations
  • Records disappear and reappear
  • Improve prediction section hides event selection
  • Week planning tool shows wrong paces
  • Marathon goal always defaults to 2:00:00
  • Can't consistently log in
  • App is immature and has bugs

Requested features

9 requests
  • Allow editing of runs
  • More personalization in training plans
  • Ability to start the training week on different days
  • Consider elevation in training calculations
  • Add more workout suggestions and paces
Show 4 more
  • Predict times for distances other than marathon
  • FAQ and tutorials for better understanding
  • Ability to plan runs in decimals
  • Integration with other platforms beyond Strava

Gym Rank

No bugs or feature requests surfaced in reviews.

In-app purchases

15 purchases

kaizen | Adaptive Run Training

Subscriptions15
  • Subscription1 Month trial$12.991 Month
  • Subscription$12.991 Month
  • Monthly Subscription7 Days trial$14.991 Month
Show 12 more
  • Monthly Subscription14 Days trial$14.991 Month
  • Subscription$14.991 Month
  • Subscription$19.993 Months
  • Subscription$24.993 Months
  • Quarterly Subscription14 Days trial$34.993 Months
  • Quarterly Subscription7 Days trial$34.993 Months
  • Subscription$49.991 Year
  • Subscription$69.991 Year
  • Annual Subscription7 Days trial$89.991 Year
  • Annual Subscription14 Days trial$89.991 Year
  • Subscription1 Month trial$89.991 Year
  • Subscription2 Months trial$89.991 Year
8 purchases

Gym Rank

Subscriptions7
  • Gym Rank Subscription Weekly3 Days trial$3.997 Days
  • Premium User Monthly$3.991 Month
  • Gym Rank Premium$4.991 Month
Show 4 more
  • Pro Users Monthly$8.991 Month
  • Gym Rank Premium14 Days trial$22.991 Year
  • Premium User Yearly$29.991 Year
  • Pro Users Yearly7 Days trial$39.991 Year
One-time1
  • Life Time Gym Rank$79.99

Questions

Is kaizen | Adaptive Run Training free?
kaizen | Adaptive Run Training is free to download, with in-app purchases available.
Is Gym Rank free?
Gym Rank is free to download, with in-app purchases available.
Which has better reviews, kaizen | Adaptive Run Training or Gym Rank?
Gym Rank is rated higher. kaizen | Adaptive Run Training averages 4.7 out of 5 from 31 ratings, while Gym Rank averages 4.8 from 171 ratings.
Do kaizen | Adaptive Run Training or Gym Rank have ads?
Neither kaizen | Adaptive Run Training nor Gym Rank shows ads.
Which is updated more often, kaizen | Adaptive Run Training or Gym Rank?
kaizen | Adaptive Run Training ships an update every 10 days, and Gym Rank every 2 weeks. Most recently, kaizen | Adaptive Run Training was updated on October 27, 2026 and Gym Rank on October 25, 2026.

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