Built With Science+ vs Epilog
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Hyper-Personalized Workouts
- Progressive Overload Guidance
- Real-Time Diet Adjustments
- AI-Powered Meal Scanner
- 250+ Exercise Tutorials
- Daily Knowledge Boosters
- AI Fitness & Nutrition Assistant
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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.
Epilog
Track your weightlifting progress with detailed metrics like weight, reps, and tempo. Analyze your performance muscle by muscle and set up circuit training routines. Measure body composition and sync with Apple Health.
- Record sets, reps, tempo, and rest
- Analyze progression by muscle group
- Create and track circuit training
- Estimate 1RM and track volume
- Log body measurements and photos
- Exercise library with animations
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The workout tracker that shows you're making progress. Epilog logs every set in seconds (weight, reps, tempo, RPE) and turns your workouts into a clear read on your progress, exercise by exercise and muscle by muscle. LOG FAST, STAY IN THE ZONE • Check off a set and the rest timer starts on its own • Rest timer on the Dynamic Island and the Lock Screen • Supersets, drop sets, warm-up sets and sets to failure • Tempo, RPE and notes on every exercise • Reorder or swap exercises in one tap YOUR PROGRESS, MUSCLE BY MUSCLE • See how much work each muscle gets, week after week • A muscle map shows where you train hard and where you lag behind • Every exercise has its own curve: estimated 1RM, top set, volume, reps • Personal records detected automatically and kept with their date 300+ EXERCISES, EXPLAINED • Instructions and common mistakes for each movement • Filter by muscle and equipment • Can't find one? Create your own CIRCUITS AND ROUTINES • HIIT circuits on the clock, AMRAP, or free rounds • Build your routines, sort them into folders, and start from ready-made programs TRACK MORE THAN THE BAR • Body weight, body fat and circumferences, charted over time • Calculators built in: plates, 1RM, percentage of 1RM, RPE, warm-up sets • Streaks and achievements to keep you coming back MADE FOR IPHONE • Home Screen widgets • Apple Health sync • Kilograms or pounds • Available in English and French ON APPLE WATCH (FIRST RELEASE) • Follow your workout and log your sets from your wrist • Rest timer and live heart rate Epilog is free to use, with unlimited workout logging. Go Pro for your full history, every stat and widgets. Try Pro free for 14 days. Download Epilog and make every workout count. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is monetization model: Epilog at freemium against Built With Science+'s subscription. Epilog also leads on update cadence (weekly vs fortnightly) and review sentiment (90% vs 80%). Built With Science+'s advantage is ratings volume (4.8K vs 2). 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
Both are free to download. Built With Science+ sells 4 in-app purchases, starting at $29.99 per month and Epilog sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Epilog holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Built With Science+ has 4.8K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 80% of Built With Science+'s written reviews are positive against 90% of Epilog's.
Built With Science+ ships an update fortnightly, Epilog weekly. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.
| Parameter | Built With Science+ | Epilog |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (4.8K ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 79.5% of reviews | 90.0% of reviews — better |
| Number of ratings | 4.8K — better | 2 |
| Update frequency | Fortnightly | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Subscription | Freemium — better |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPod, Apple Watch |
| Requires iOS | 16.2 | 15.1 — better |
| Further details — not scored | ||
| Size | 235 MB | 112 MB |
| Age rating | 4+ | 4+ |
| Developer | Built With Science Holdings Corp | Fit Mass |
Customer experience
Built With Science+
Epilog
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
Epilog
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Built With Science+
- Monthly Membership14 Days trial$29.991 Month
- Annual Membership14 Days trial$189.001 Year
- Intermediate Program Unlock$49.00
- Beginner Program Unlock$49.00
Epilog
- Epilog Pro (Mensuel)14 Days trial$4.991 Month
- Epilog Pro (Annual)14 Days trial$22.991 Year
Questions
Is Built With Science+ free?
Is Epilog free?
Which has better reviews, Built With Science+ or Epilog?
Do Built With Science+ or Epilog have ads?
Which is updated more often, Built With Science+ or Epilog?
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