Comparison

EVOLUTION 3 vs Flex AI Workout Trainer & Log

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

Head to head
About

EVOLUTION 3

Follow a year-long weightlifting program with expert video tutorials on proper form. Track your progress, weights, and rest times with built-in tools. This ad-free app offers elite Hollywood personal training to help you achieve your fitness goals.

Highlights
  • Year-long workout program
  • Expert video tutorials
  • Progress tracking
  • Built-in timer
  • Barbell calculator
  • Ad-free experience
Read full description

EVOLUTION 3:59 Daily Weight Lifting Program with Expert Video Tutorials About EVOLUTION 3:59 Considered to be “Hollywood’s Hardest Workout” and endorsed by Arnold himself—EVOLUTION 3:59 is the cutting edge gym routine to build the body you’ve always wanted. Follow the exact fitness plan that deemed Joe Manganiello one of Men's Health's 100 Fittest Men of All Time and got him shredded for his role on HBO’s True Blood. This app will provide you the step by step guide to track your entire year of workouts while being coached through video tutorials on proper form by one of Hollywood’s top personal trainers and CrossFit Games champion, Ron Mathews with the exercises demonstrated by Joe himself. Features - Top Hollywood Elite Personal Training & Programming - Simple and easy to follow design - Follow one program for your FULL YEAR of WORKOUTS - No more getting overwhelmed by too many programs to choose from - Exercise Video Library of over 100 expert tutorials on proper form & technique - Notes section for each exercise - no more pen and paper - Track your light, moderate and heavy weights for each exercise - Built-in Timer keeps your rest time on track between sets - Supersets gray-out as you complete for easy tracking of workout - Barbell Calculator helps to quickly add up weight - Ad-free! “I’m going to need you to accept nothing less than your best effort. You owe it to yourself to know, once and for all, how far you can go. It’s time to EVOLVE” ~Joe Manganiello Support If you experience issues with the EVOLUTION 3:59 workout app or have suggestions to improve it, we'd love to hear from you! Just contact us from the app by going to Menu > Tech Support. One Month Subscription Subscription is auto-renewable which means that once purchased it will be auto-renewed every month until you cancel it 24 hours prior to the end of the current period. Duration of the subscription is 1 Month with a charge of $9.99 every month. iTunes Account will be charged for renewal within 24-hours prior to the end of the current period with the cost of $9.99. Manage your Subscription and Auto-Renewal by going to your Account Settings. Terms of Service https://evolution359.com/terms-of-service/ Privacy Policy https://evolution359.com/privacy-policy/

About

Flex AI Workout Trainer & Log

This app uses AI to provide personalized workout plans and real-time form feedback for weightlifters. It tracks progress, offers adaptive progression, and includes motivational features like leaderboards and streaks. It's designed for all experience levels, from beginners to pros.

Highlights
  • AI personal trainer
  • Real-time form feedback
  • Personalized workout plans
  • Adaptive progression
  • Strength tracking
  • Community leaderboards
  • Apple Watch integration
Features
Read full description

Flex AI is the world’s first true AI personal trainer — built for lifters who want to train smarter, progress faster, and perfect their form. Whether you’re chasing size, strength, or consistency, Flex uses real-time AI to guide every rep, adjust your program, and keep you motivated through challenges, leaderboards, and streaks. - Your AI Coach, Every Rep Personalized workouts built automatically by AI personas that learn your goals, history, and preferences. Real-time form feedback powered by patented computer-vision AI — get instant corrections on squats, bench, deadlift, rows, and more. Adaptive progression and deloading backed by sports-science principles — no spreadsheets, no guesswork. - Train Smarter — See Results AI tracks your strength curve and increases weight when you’re ready. Visual progress graphs show PRs, volume, and recovery trends. Track sets, reps, and tempo with a tap — or automatically with Apple Watch. - Stay Motivated & Connected Join a global community of lifters. Compete on leaderboards, build streaks, and earn badges. Post progress photos, celebrate milestones, and share results. - Accessible to Everyone Free to start with all core features included. Upgrade anytime for advanced AI coaching and premium analytics. Designed for all experience levels — from beginners to pros. - Why Flex AI Real-time AI form feedback (patented) Adaptive, science-based programming Progress tracking & recovery insights Gamified streaks + leaderboards Apple Watch integration Built for hypertrophy & strength goals Start Training Smarter — Today Download Flex AI and experience personal training powered by real AI. Perfect your form. Unlock your best lift. Train smarter — free on iPhone + Apple Watch.

Screenshots

EVOLUTION 34 screens
Flex AI Workout Trainer & Log4 screens

Verdict

The call

The clearest difference is monetization model: Flex AI Workout Trainer & Log at freemium against EVOLUTION 3's subscription. Flex AI Workout Trainer & Log also leads on ratings volume (2.4K vs 238) and update cadence (every 9 days vs every 3 weeks). EVOLUTION 3's advantage is iOS requirement (11.0 vs 18.0). 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. EVOLUTION 3 sells 3 in-app purchases, starting at $9.99 per month and Flex AI Workout Trainer & Log sells 8 in-app purchases, starting at $12.99 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 — 4.7 for EVOLUTION 3 against 4.6 for Flex AI Workout Trainer & Log. That said, the two scores are not equally well evidenced: Flex AI Workout Trainer & Log has 2.4K ratings behind it against 238, so its average is the more settled of the two. Written reviews are what separate them: 76% of EVOLUTION 3's written reviews are positive against 69% of Flex AI Workout Trainer & Log's.

UpkeepUpdate frequency

EVOLUTION 3 ships an update every 3 weeks, Flex AI Workout Trainer & Log every 9 days. Both last shipped on September 29, 2026.

Scorecard4 real differences · 6 level
EVOLUTION 3 versus Flex AI Workout Trainer & Log: the parameters behind the verdict, then further details
ParameterEVOLUTION 3Flex AI Workout Trainer & Log
PriceFreeFree
Rating4.7 (238 ratings) — better4.6 (2.4K ratings)
Positive reviews76.0% of reviews — better69.3% of reviews
Number of ratings2382.4K — better
Update frequencyEvery 3 weeksEvery 9 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationSubscriptionFreemium — better
DevicesiPhone, iPodiPhone, Apple Watch
Requires iOS11.0 — better18.0
Further details — not scored
Size181 MB574 MB
Age rating4+17+
DeveloperEVOLUTION359Flex Artificial Intelligence Inc.

Customer experience

EVOLUTION 3

All ratings238 ratings
Positive92.9%
Neutral5.5%
Negative1.7%
Written reviews25 reviews
Positive76.0%
Neutral0.0%
Negative24.0%

Flex AI Workout Trainer & Log

All ratings2,405 ratings
Positive92.0%
Neutral2.6%
Negative5.4%
Written reviews303 reviews
Positive69.3%
Neutral6.6%
Negative24.1%

User reviews

EVOLUTION 3

From 238 App Store ratings

What we love

  • 💪 Great for physical and mental health
  • 📚 Content aligns with the book
  • 🏋️‍♀️ Variety of exercises and training styles
  • 👍 Easy to navigate and track weights
  • 🎥 Excellent video support for proper form

Room to improve

  • 💸 Expensive subscription model
  • ⏳ Content unlock delays
  • 📱 Inconsistent app performance
  • 📶 Requires WiFi to open initially
  • 🔄 Workouts can be repetitive

Flex AI Workout Trainer & Log

From 2.4K App Store ratings

What we love

  • 🚀 Detailed workout tracking
  • 👍 Customizable workouts
  • 🔒 Comprehensive exercise library
  • 💡 Helpful progress tracking
  • 👍 Clean and intuitive interface

Room to improve

  • 🐛 Glitches and bugs
  • 💰 Expensive premium subscription
  • 🔒 Limited functionality without premium
  • 🐛 Inconsistent rest timer
  • 🐛 Workout data loss

Bugs and requests

EVOLUTION 3

Reported bugs

5 issues
  • App won't open
  • Cannot use after switching phones
  • Login fails with error messages in low signal areas
  • Workouts are not correct/repeated
  • Exercise history/progress lost on break

Requested features

7 requests
  • Offer a one-time purchase option
  • Add a timer alarm for workouts
  • Ensure all exercises have videos
  • Allow offline access to workouts
  • Improve weight tracking functionality
Show 2 more
  • Provide a simpler interface
  • Offer a less expensive subscription

Flex AI Workout Trainer & Log

Reported bugs

3 issues
  • App crashes on iOS 16 update
  • Inability to log workouts on previous days
  • Inconsistent syncing between app and Apple Watch

Requested features

4 requests
  • Offline workout mode
  • Ability to save and reuse custom workout plans
  • Muscle group targeting and analytics
  • Social features and community integration

In-app purchases

3 purchases

EVOLUTION 3

Subscriptions3
  • EVOLUTION 3:59 Videos & WODs7 Days trial$9.991 Month
  • EVOLUTION 3:59 Videos & WODs7 Days trial$24.993 Months
  • EVOLUTION 3:59 Videos & WODs7 Days trial$89.991 Year
8 purchases

Flex AI Workout Trainer & Log

Subscriptions6
  • Premium Subscription Monthly$12.991 Month
  • Premium Plus Monthly$29.991 Month
  • Premium Plus Family Monthly$69.991 Month
Show 3 more
  • Premium Yearly Subscription$79.991 Year
  • Premium Plus Yearly7 Days trial$191.991 Year
  • Premium Plus Family Yearly7 Days trial$499.991 Year
One-time2
  • 1 Month Free PremiumFree
  • Lifetime Free PremiumFree

Questions

Is EVOLUTION 3 free?
EVOLUTION 3 is free to download, with in-app purchases available.
Is Flex AI Workout Trainer & Log free?
Flex AI Workout Trainer & Log is free to download, with in-app purchases available.
Which has better reviews, EVOLUTION 3 or Flex AI Workout Trainer & Log?
EVOLUTION 3 is rated higher. EVOLUTION 3 averages 4.7 out of 5 from 238 ratings, while Flex AI Workout Trainer & Log averages 4.6 from 2.4K ratings.
Do EVOLUTION 3 or Flex AI Workout Trainer & Log have ads?
Neither EVOLUTION 3 nor Flex AI Workout Trainer & Log shows ads.
Which is updated more often, EVOLUTION 3 or Flex AI Workout Trainer & Log?
EVOLUTION 3 ships an update every 3 weeks, and Flex AI Workout Trainer & Log every 9 days. Most recently, EVOLUTION 3 was updated on September 29, 2026 and Flex AI Workout Trainer & Log on September 29, 2026.

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