Comparison

Flex AI Workout Trainer & Log vs Coachify AI

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

Head to head
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.

About

Coachify AI

This AI-powered fitness app creates personalized workout plans for both gym and home. It includes a diet and calorie tracker to help you meet your macro goals and monitors your progress with detailed strength reports. Achieve your fitness journey with tailored guidance.

Highlights
  • AI-powered personalized workout plans
  • Gym and home workout options
  • Calorie and macro tracking
  • Workout planner with rest days
  • Gym workout tracker with weight logging
  • Detailed strength reports
  • Progress monitoring
Features
Read full description

Coachify.AI is a gym workout planner app with workout planner and a workout tracker that covers home workouts, gym workouts, calorie and macro tracking and monitoring progress. With Coachify.AI, weights never felt lighter, you will experience progress like never before with our all in one fitness app. This fitness app will cover everything that you need to progress in your fitness journey. With thousands of programs vetted by certified personal trainers, our AI will match you with the one that is tailored to your needs. This fitness app will give you the most gains! **Gym Workout & Home Workouts** With gym and home workouts tailored to your needs, weightlifting will be much easier to see progress with! Your AI Personal Trainer creates workouts tailored to you whether you lift at the gym with equipment or you need home workouts with no equipment! **Diet & Calorie Tracker** Coachify.AI created diet goals for you daily. It tells you exactly how much calories, how much protein, how much carbs etc. to eat every day for your workout plan to give you the best growth! You can then log all your Calories using the Calorie Tracker in this fitness app **Workout Planner** With the workout planner in Coachify.AI, the app will tell you on which days to workout which muscle groups with which exercises. The app will also tell you your rest days to make sure you're resting enough and making enough progress with your gym workout or home workout. You can use the gym workout planner to get 100% personalized workout plans from your AI Personal trainer. The workout planner uses AI to tailor workout plans to your needs and uses scientifically proven methodologies of building muscle to make sure you reach your goals. **Gym Workout Tracker** After using the workout planner, you can use the weight logging feature in this fitness app to log your weights when lifting. This will then help the app know your limits and your level of strength. Then every workout you will be shown a detailed report on how much you improved! The workout tracker also shows you your rankings amongst other people in your weight class and what percent of them you're outperforming. You can also use the workout tracker to analyze your body and muscles to see which are the strongest and which are the weakest. **Strength Reports** This fitness app generates strength reports for you at the end of every gym workout! You can see how strong you are! If you're ready to boost your fitness journey, this is the right gym workout app for you! Weight lifting was never easier with Coachify.AI. This fitness app is going to make your lifting journey a 100x easier with it's built in gym workout & home workouts that are personalized just for you! Coachify.AI is the #1 fitness and weightlifting app. Privacy Policy: https://coachify.ai/privacy-policy Terms Of Use: https://coachify.ai/terms-of-use End User Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Flex AI Workout Trainer & Log4 screens
Coachify AI4 screens

Verdict

The call

The clearest difference is update cadence: Coachify AI at every 3 days against Flex AI Workout Trainer & Log's every 9 days. Coachify AI also leads on iOS requirement (16.4 vs 18.0). Flex AI Workout Trainer & Log's advantage is review sentiment (69% vs 60%). On price, rating, ratings volume 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. Flex AI Workout Trainer & Log sells 8 in-app purchases, starting at $12.99 per month and Coachify AI sells 11 in-app purchases, starting at $7.99 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 — 4.6 for Flex AI Workout Trainer & Log against 4.6 for Coachify AI. Both are backed by a comparable volume of ratings — 2.4K and 2K respectively. Written reviews are what separate them: 69% of Flex AI Workout Trainer & Log's written reviews are positive against 60% of Coachify AI's.

UpkeepUpdate frequency

Flex AI Workout Trainer & Log ships an update every 9 days, Coachify AI every 3 days. Both last shipped on October 20, 2026.

Scorecard3 real differences · 7 level
Flex AI Workout Trainer & Log versus Coachify AI: the parameters behind the verdict, then further details
ParameterFlex AI Workout Trainer & LogCoachify AI
PriceFreeFree
Rating4.6 (2.4K ratings)4.6 (2K ratings)
Positive reviews69.0% of reviews — better59.6% of reviews
Number of ratings2.4K — better2K
Update frequencyEvery 9 daysEvery 3 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, Apple WatchiPhone, iPad
Requires iOS18.016.4 — better
Further details — not scored
Size574 MB105 MB
Age rating17++4
DeveloperFlex Artificial Intelligence Inc.Coachify.AI

Customer experience

Flex AI Workout Trainer & Log

All ratings2,412 ratings
Positive92.0%
Neutral2.6%
Negative5.4%
Written reviews310 reviews
Positive69.0%
Neutral6.5%
Negative24.5%

Coachify AI

All ratings1,969 ratings
Positive90.4%
Neutral3.8%
Negative5.8%
Written reviews203 reviews
Positive59.6%
Neutral3.9%
Negative36.5%

User reviews

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

Coachify AI

From 2K App Store ratings

What we love

  • 👍 Helpful personal training
  • 🚀 Easy to use
  • 💪 Effective workouts
  • 📊 Detailed tracking and progress
  • 🍽️ Useful nutrition guidance

Room to improve

  • 🐛 Buggy and glitchy
  • 🔒 Difficult to cancel subscription
  • 💰 Expensive
  • 🤖 AI guidance not always accurate
  • 📱 Compatibility issues with certain devices

Bugs and requests

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

Coachify AI

Reported bugs

4 issues
  • Workouts not saving properly
  • Login and password reset problems
  • Frequent app crashes and freezes
  • Nutrition tracking inaccuracies

Requested features

4 requests
  • More exercise variations and customization
  • Seamless integration with other fitness apps
  • Ability to manually edit workout logs
  • Improved customer support and communication

In-app purchases

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
11 purchases

Coachify AI

Subscriptions8
  • Coachify AI Premium3 Days trial$7.991 Month
  • Coachify.AI Access to Coaches$14.991 Month
  • Coachify AI Premium3 Days trial$17.993 Months
Show 5 more
  • Coachify.AI Premium$29.993 Months
  • Coachify.AI 6 Months Access$34.996 Months
  • Coachify.AI Premium 1 Year$59.991 Year
  • Coachify AI Premium3 Days trial$59.991 Year
  • Coachify.AI 1 Year Premium$79.991 Year
One-time3
  • 200 SweatCoins$9.99
  • 500 SweatCoins$24.99
  • 1000 SweatCoins$44.99

Questions

Is Flex AI Workout Trainer & Log free?
Flex AI Workout Trainer & Log is free to download, with in-app purchases available.
Is Coachify AI free?
Coachify AI is free to download, with in-app purchases available.
Which has better reviews, Flex AI Workout Trainer & Log or Coachify AI?
Flex AI Workout Trainer & Log and Coachify AI are both rated 4.6 out of 5 on the App Store, from 2.4K and 2K ratings respectively.
Do Flex AI Workout Trainer & Log or Coachify AI have ads?
Neither Flex AI Workout Trainer & Log nor Coachify AI shows ads.
Which is updated more often, Flex AI Workout Trainer & Log or Coachify AI?
Flex AI Workout Trainer & Log ships an update every 9 days, and Coachify AI every 3 days. Most recently, Flex AI Workout Trainer & Log was updated on October 20, 2026 and Coachify AI on October 20, 2026.

Other comparisons