# Built With Science+ vs BUFF | Gym Workout Tracker

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.

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.

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.

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

## The numbers

| Metric | Built With Science+ | BUFF | Gym Workout Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (3.9K ratings)](https://appshunter.io/ios/app/built-with-science-plus/id6446000532/reviews) | [4.8 (261 ratings)](https://appshunter.io/ios/app/buff-gym-workout-tracker/id6480278630/reviews) |
| Number of ratings | **3.9K** | 261 |
| Positive reviews | 79.8% of reviews | **85.1% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Fortnightly** |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 233 MB | 225 MB |
| Requires iOS | 16.2 | **15.6** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Built With Science Holdings Corp](https://appshunter.io/developer/1559732895) | [Buff Dudes LLC](https://appshunter.io/developer/1738608861) |

## What reviewers say

### Built With Science+

[App page](https://appshunter.io/ios/app/built-with-science-plus/id6446000532)

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:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Membership | $29.99 | per month |
| Annual Membership | $189.00 | per year |
| Intermediate Program Unlock | $49.00 | one-time |
| Beginner Program Unlock | $49.00 | one-time |

**What reviewers like**

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

**What reviewers complain about**

- 🐛 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

**Reported bugs**

- 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**

- 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

[App page](https://appshunter.io/ios/app/buff-gym-workout-tracker/id6480278630)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $12.99 | per month |
| Yearly | $99.99 | per year |

**What reviewers like**

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

**What reviewers complain about**

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

**Reported bugs**

- Failure to load or save workouts
- Unresponsive login button
- White screen issue on iOS

**Requested features**

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


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*