Comparison

JuggernautAI vs BUFF | Gym Workout Tracker

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

Head to head
About

JuggernautAI

This app uses AI to create personalized strength training programs for powerlifting and powerbuilding. It adapts to your feedback and goals, optimizing volume, frequency, and exercise selection for maximum strength gains and recovery.

Highlights
  • AI-generated personalized workout plans
  • Powerlifting and Powerbuilding goal focus
  • Adaptive training based on real-time feedback
  • Optimized training frequency and volume
  • Exercise selection for weak points
  • Periodization strategy for fatigue management
Features
Read full description

Juggernaut Training Systems’ revolutionary A.I. strength training system has arrived on iOS. Subscribe to JuggernautAI to access all our coaching and get stronger than you can imagine with The Smartest Program for You. Designed by legendary coach Chad Wesley Smith with revolutionary technology by Tim Arnold, JuggernautAI is like having the best strength coach in the world with you during every workout in the gym. HOW IT WORKS JuggernautAI helps you reach your strength potential using our cutting edge technology - the JuggernautAI Powerlifting and Powerbuilding system - in an efficient and easy to use way; Decide on your goal of Powerlifting, to focus on building your Squat, Bench, and Deadlift, or Powerbuilding, to balance your focus between bodybuilding and strength training. Tell us about yourself, your level of experience, and your strength goals JuggernautAI will then design a unique individualized program tailored just for you with the use of expert technology As you progress, the system will continue to adapt your training plan based on your real-time individualized feedback, ensuring you continue to grow and achieve your strength goals. WHY IT WORKS Your JuggernautAI strength program is specifically tailored to your needs and includes; ◆◆ Individualized Volume Landmarks. Do enough training to advance but not so much that you can’t recover. ◆◆ Optimized Training Frequency. Decide how many days a week you want to train, and JuggernautAI will optimize when and how often you should Squat, Bench, and Deadlift. ◆◆ Personalized Periodization Strategy. JuggernautAI finds the best way to progress to ensure you maximize your training while also managing fatigue through a strategic phasic periodization plan. ◆◆ Exercise Selection for your Weak Points. JuggernautAI looks at your weak points and your strength in individual lifts to decide which exercises will be most effective in helping you improve. As a Powerbuilding user, you can also choose which body part to focus on to ensure your physique improves the way you want it to. ◆ Real-Time Feedback Your unique individualized program continues to adapt to your feedback with our Readiness Rating System, making adjustments to your program pre-session, intra-session, session to session, week to week, block to block, and program to program Subscribe to JuggernautAI and get the smartest program for you. ———- ABOUT JUGGERNAUT TRAINING SYSTEMS Juggernaut Training Systems is The Leader in Strength, having helped thousands of athletes from beginners to World Champions maximize their results and reach their goals. We deliver principle-based coaching through cutting-edge technology to help you get the best results of your life. Privacy Policy: https://www.jtsstrength.com/app-privacy-policy/ Terms of Use: https://www.jtsstrength.com/app-terms-of-use/

About

BUFF | Gym Workout Tracker

This app helps users track gym workouts, log sets and reps, and monitor personal records. It offers video demonstrations for exercises, customizable workout plans, and community features to share progress and stay motivated.

Highlights
  • Dynamic workout and progress tracking
  • Extensive exercise library with video demonstrations
  • Customizable workout routines and pre-designed plans
  • Detailed progress graphs and muscle usage visualization
  • Community and social sharing features
  • Gamified progress with achievements and medals
Features
Read full description

Buff Gym Workout: Dynamic Tracker, Log & Planner Level-Up Your Fitness Goals. Simplify and supercharge your fitness journey with Buff. Whether you're a beginner or an advanced lifter, our dynamic workout tracker gives you everything you need to log your sessions, master your form, connect with friends, and push for new personal bests. WHAT USERS ARE SAYING - "Buff is an absolute game-changer... From the moment you open the app, you’re greeted with an intuitive interface that makes navigating through its features effortless." - elm84$ - "The Buff app was key in helping me to prepare for my first bodybuilding competition. With its help, I placed 1st in two categories!" - H. White - "I really enjoy the achievement system—it adds a nice motivational boost and keeps me engaged. One of the best parts is the workout videos; every exercise has a clear demonstration..." - Mythoriir WHAT MAKES BUFF YOUR BEST LIFTING PARTNER? 1. Dynamic Workout & Progress Tracking - Detailed Gym Log: Easily track every set, rep, and weight. Log total volume, total reps, and monitor your PRs (Personal Records) instantly. - Bodyweight Trends: Track your bodyweight evolution and key performance metrics (average reps, sets, and weight) with colorful, detailed graphs. - Visualize Muscle Usage: Our unique Anatomy Highlights show you exactly which muscles you've worked and provide an intensity percentage breakdown to ensure balanced training. 2. Master Your Form & Plan Your Training - Extensive Exercise Library: Explore a wide range of 500+ exercises with free, high-quality video demonstrations featuring real people to ensure perfect technique, maximum results, and safety. - Customization is Key: Create your own personalized workout routines or choose from our pre-designed, goal-oriented plans. - Seamless Tracking: Maintain your consistency with a Daily Streak counter that helps you stay on track and build unbreakable habits. 3. Get Motivated & Stay Accountable - Community & Social Sharing: Join the active Buff Community! Share results, follow friends' progress, celebrate your milestones, and inspire others directly within the app. - Gamified Progress: Earn Experience Points (XP) and Medals by hitting new achievements in key categories like Strength, Endurance, and Stamina. Make tracking fun and rewarding! BY HUMANS, FOR HUMANS (A NO-AI APPROACH) - Most fitness apps rely on AI, but Buff uses none of it. Every workout plan, exercise tutorial, and piece of artwork was created by real people, with the singular goal of making fitness accessible and effective for you. KEY FEATURES AT A GLANCE - Track workouts and exercises with an easy-to-use interface. - Access video demonstrations for proper exercise technique. - Thoughtfully crafted plans for every fitness level (Beginner to Advanced). - Create custom workouts and routines. - In-depth progress graphs for total volume, reps, PRs, and bodyweight. - Muscle usage visualization with anatomy highlights and percentage breakdowns. - Social sharing and community features. - Experience Points & Achievements to gamify your fitness journey. Subscriptions: Yearly Plan • Duration: 1 year • Price: $99.99/year • Payment charged to iTunes Account at purchase confirmation • Renewal charged within 24 hours before the current period ends • Manage or turn off auto-renewal in Account Settings • Unused trial period (if any) is forfeited upon subscription purchase Monthly Plan • Duration: 1 month • Price: $12.99/month • Payment charged to iTunes Account at purchase confirmation • Renewal charged within 24 hours before the current period ends • Manage or turn off auto-renewal in Account Settings • Unused trial period (if any) is forfeited upon subscription purchase Terms and conditions: https://www.buffdudes.us/pages/buff-app-terms-conditions Privacy policy: https://www.buffdudes.us/pages/buff-app-privacy-policy

Screenshots

JuggernautAI4 screens
BUFF | Gym Workout Tracker4 screens

Verdict

The call

The clearest difference is monetization model: BUFF | Gym Workout Tracker at free with in-app purchases against JuggernautAI's subscription. BUFF | Gym Workout Tracker also leads on review sentiment (85% vs 73%). JuggernautAI's advantage is update cadence (every 4 days vs fortnightly) and ratings volume (5.7K vs 265). On price, rating, ads and in-app purchases 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. JuggernautAI sells 1 in-app purchase, starting at $34.99 per month and BUFF | Gym Workout Tracker sells 2 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 — 4.8 for JuggernautAI against 4.8 for BUFF | Gym Workout Tracker. That said, the two scores are not equally well evidenced: JuggernautAI has 5.7K ratings behind it against 265, so its average is the more settled of the two. Written reviews are what separate them: 73% of JuggernautAI's written reviews are positive against 85% of BUFF | Gym Workout Tracker's.

UpkeepUpdate frequency

JuggernautAI ships an update every 4 days, BUFF | Gym Workout Tracker fortnightly. The most recent releases landed on October 14, 2026 and October 15, 2026 respectively.

Scorecard4 real differences · 6 level
JuggernautAI versus BUFF | Gym Workout Tracker: the parameters behind the verdict, then further details
ParameterJuggernautAIBUFF | Gym Workout Tracker
PriceFreeFree
Rating4.8 (5.7K ratings)4.8 (265 ratings)
Positive reviews72.7% of reviews85.3% of reviews — better
Number of ratings5.7K — better265
Update frequencyEvery 4 days — betterFortnightly
AdsNoNo
In-app purchasesYesYes
MonetizationSubscriptionFree with in-app purchases — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.615.6
Further details — not scored
Size108 MB208 MB
Age rating17+17+
DeveloperJuggernaut AppsBuff Dudes LLC

Customer experience

JuggernautAI

All ratings5,655 ratings
Positive97.0%
Neutral1.2%
Negative1.7%
Written reviews216 reviews
Positive72.7%
Neutral4.2%
Negative23.1%

BUFF | Gym Workout Tracker

All ratings265 ratings
Positive94.7%
Neutral0.4%
Negative4.9%
Written reviews116 reviews
Positive85.3%
Neutral2.6%
Negative12.1%

User reviews

JuggernautAI

From 5.7K App Store ratings

What we love

  • 🚀 Excellent programming and customization
  • 👍 Detailed and user-friendly app
  • 🔍 Adjusts based on user feedback
  • 📈 Helps users achieve their goals
  • 💪 Effective for building strength and muscle

Room to improve

  • 💰 Expensive monthly subscription
  • 🔒 Paywall restricts access to full app
  • 🕰️ Excessive time required for workouts
  • 🐛 Occasional bugs and glitches

BUFF | Gym Workout Tracker

From 265 App Store ratings

What we love

  • 🚀 Intuitive interface
  • 👍 Gamification and leveling up
  • 🚀 Detailed exercise tutorials
  • 👍 Customizable workout plans
  • 👍 Community features

Room to improve

  • 🐛 Bugs and crashes
  • 🔒 Login and account issues
  • 💰 Expensive subscription
  • 🔇 Lack of sound controls

Bugs and requests

JuggernautAI

Reported bugs

3 issues
  • Clearing of workout history after each block
  • Issues with the auto-timer feature
  • Problems with selecting dates and times during setup

Requested features

4 requests
  • Integration with Apple Health or other fitness apps
  • More flexibility in scheduling and workout days
  • Improved exercise library and replacement options
  • Better tracking and history of past workouts

BUFF | Gym Workout Tracker

Reported bugs

3 issues
  • Failure to load or save workouts
  • Unresponsive login button
  • White screen issue on iOS

Requested features

4 requests
  • Apple Watch integration
  • Garmin/MyFitnessPal integration
  • Ability to delete workout history
  • Replacement exercises for home gym equipment

In-app purchases

1 purchases

JuggernautAI

Subscriptions1
  • JuggernautAI Monthly2 variants$34.991 Month
2 purchases

BUFF | Gym Workout Tracker

Subscriptions2
  • Monthly7 Days trial$12.991 Month
  • Yearly7 Days trial$99.991 Year

Questions

Is JuggernautAI free?
JuggernautAI is free to download, with in-app purchases available.
Is BUFF | Gym Workout Tracker free?
BUFF | Gym Workout Tracker is free to download, with in-app purchases available.
Which has better reviews, JuggernautAI or BUFF | Gym Workout Tracker?
JuggernautAI and BUFF | Gym Workout Tracker are both rated 4.8 out of 5 on the App Store, from 5.7K and 265 ratings respectively.
Do JuggernautAI or BUFF | Gym Workout Tracker have ads?
Neither JuggernautAI nor BUFF | Gym Workout Tracker shows ads.
Which is updated more often, JuggernautAI or BUFF | Gym Workout Tracker?
JuggernautAI ships an update every 4 days, and BUFF | Gym Workout Tracker fortnightly. Most recently, JuggernautAI was updated on October 14, 2026 and BUFF | Gym Workout Tracker on October 15, 2026.

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