Comparison

Built With Science+ 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

Built With Science+

This intelligent fitness companion offers personalized workout plans and nutrition advice based on scientific insights. It adapts to your progress with real-time feedback, providing guidance for continuous gains and informed health decisions.

Highlights
  • Hyper-Personalized Workouts
  • Progressive Overload Guidance
  • Real-Time Diet Adjustments
  • AI-Powered Meal Scanner
  • 250+ Exercise Tutorials
  • Daily Knowledge Boosters
  • AI Fitness & Nutrition Assistant
Features
Read full description

Reach your goals faster with BWS+ all-in-one fitness coach. Frustrated with cookie-cutter workout plans and confusing nutrition advice? BWS+ is your intelligent coach and complete fitness companion for achieving the body you've always wanted. The app integrates insights from leading fitness scientists, coaches, and dietitians, offering personalized advice based on your unique body and goals. It evolves with you, adapting your workouts and nutrition based on real-time feedback, encapsulating decades of experience into a dynamic coach that tailors itself to your needs. The latest science, personalized to you - Hyper-Personalized Workouts: Built with Science's advanced algorithm creates a workout plan specifically for your body, goals, and schedule. Whether you're hitting the gym or training at home, we've got you covered. - Progressive Overload Guidance: Never plateau again. BWS+ tells you exactly how to adjust your weights and reps each session for continuous gains. - Real-Time Diet Adjustments: As your body changes, so do your nutritional needs. Our app adapts your meal plan weekly, ensuring you're always on track. All-in-One Fitness and Nutrition Solution - 250+ In-Depth Exercise Tutorials: Master proper form with our detailed video guides, packed with science-based insights. - AI-Powered Meal Scanner: Say goodbye to tedious calorie counting. Simply snap a photo of your meal, and our AI does the rest, accurately tracking your nutrition in seconds. - Daily Knowledge Boosters: Unlock 200+ bite-sized lessons to build your fitness IQ and make informed decisions about your health. One App is All You Need - AI Fitness & Nutrition Assistant: Get personalized answers to your fitness and nutrition questions, as if you're talking directly to Jeremy Ethier. - Muscle Group Prioritizer: Focus on specific muscles that need extra attention for balanced development. - Recomp Detector: Track simultaneous fat loss and muscle gain with our advanced body composition analysis. - Step Tracking and Daily Activity Goals: Seamlessly integrate with Apple Health and Google Fit to optimize your overall activity levels. We've combined cutting-edge technology with years of scientific research to create an app that delivers real, lasting transformations. No more guesswork, no more wasted time in the gym. BWS+ provides the structure and guidance you need to finally achieve the body you deserve. Download now and take the first step towards the best version of yourself! This app requires an active BuiltWithScience+ membership or an in-app subscription purchased through the App Store to access its features and content. Subscription details and terms are available within the app.

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

Built With Science+4 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 Built With Science+'s subscription. Built With Science+'s advantage is ratings volume (3.9K vs 261). On price, rating, review sentiment and update cadence 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. Built With Science+ sells 4 in-app purchases, starting at $29.99 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 Built With Science+ against 4.8 for BUFF | Gym Workout Tracker. That said, the two scores are not equally well evidenced: Built With Science+ has 3.9K ratings behind it against 261, so its average is the more settled of the two. Written reviews are what separate them: 80% of Built With Science+'s written reviews are positive against 85% of BUFF | Gym Workout Tracker's.

UpkeepUpdate frequency

Built With Science+ ships an update every 2 weeks, BUFF | Gym Workout Tracker fortnightly. Both last shipped on September 23, 2026.

Scorecard2 real differences · 8 level
Built With Science+ versus BUFF | Gym Workout Tracker: the parameters behind the verdict, then further details
ParameterBuilt With Science+BUFF | Gym Workout Tracker
PriceFreeFree
Rating4.8 (3.9K ratings)4.8 (261 ratings)
Positive reviews79.8% of reviews85.1% of reviews — better
Number of ratings3.9K — better261
Update frequencyEvery 2 weeksFortnightly — better
AdsNoNo
In-app purchasesYesYes
MonetizationSubscriptionFree with in-app purchases — better
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPod
Requires iOS16.215.6 — better
Further details — not scored
Size233 MB225 MB
Age rating4+17+
DeveloperBuilt With Science Holdings CorpBuff Dudes LLC

Customer experience

Built With Science+

All ratings3,926 ratings
Positive95.6%
Neutral1.9%
Negative2.5%
Written reviews807 reviews
Positive79.8%
Neutral6.2%
Negative14.0%

BUFF | Gym Workout Tracker

All ratings261 ratings
Positive94.6%
Neutral0.4%
Negative5.0%
Written reviews114 reviews
Positive85.1%
Neutral2.6%
Negative12.3%

User reviews

Built With Science+

From 3.9K App Store ratings

What we love

  • 👍 Comprehensive fitness and nutrition tracking
  • 🚀 Convenient all-in-one app
  • 📚 Helpful educational lessons
  • 💪 Science-backed program
  • 🎯 Customized and adaptive workouts

Room to improve

  • 🐛 Occasional performance issues and bugs
  • 🔍 Limited food database and recipe options
  • 📱 Lack of integration with other fitness apps and devices
  • 🕰️ Inflexible workout scheduling
  • 💬 Limited human interaction and coaching support

BUFF | Gym Workout Tracker

From 261 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

Built With Science+

Reported bugs

4 issues
  • Workout data sometimes gets lost or marked incomplete
  • App takes a long time to open
  • Login and sign-up issues for existing customers
  • Inconsistent exercise recommendations and adjustments

Requested features

5 requests
  • Add ability to create and save custom recipes
  • Integrate with Apple Health and other fitness platforms
  • Provide more flexibility in workout scheduling
  • Enhance human coaching and support features
  • Improve performance and stability

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

4 purchases

Built With Science+

Subscriptions2
  • Monthly Membership14 Days trial$29.991 Month
  • Annual Membership14 Days trial$189.001 Year
One-time2
  • Intermediate Program Unlock$49.00
  • Beginner Program Unlock$49.00
2 purchases

BUFF | Gym Workout Tracker

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

Questions

Is Built With Science+ free?
Built With Science+ 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, Built With Science+ or BUFF | Gym Workout Tracker?
Built With Science+ and BUFF | Gym Workout Tracker are both rated 4.8 out of 5 on the App Store, from 3.9K and 261 ratings respectively.
Do Built With Science+ or BUFF | Gym Workout Tracker have ads?
Neither Built With Science+ nor BUFF | Gym Workout Tracker shows ads.
Which is updated more often, Built With Science+ or BUFF | Gym Workout Tracker?
Built With Science+ ships an update every 2 weeks, and BUFF | Gym Workout Tracker fortnightly. Most recently, Built With Science+ was updated on September 23, 2026 and BUFF | Gym Workout Tracker on September 23, 2026.

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