Optimize Fitness vs BuiltDiff
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Optimize Fitness
This application helps users track their workouts with an intuitive interface and an extensive exercise library. It includes features like a rest timer, weight tracking, and personalized calorie insights to support fitness goals. Users can also create unlimited workout templates and monitor exercise progression.
- Intuitive workout tracking
- Extensive exercise library
- Built-in rest timer
- Weight and progression tracking
- Personalized calorie insights
- Unlimited workout templates
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Optimize Fitness: Your Ultimate Workout Tracker Optimize Fitness is your go-to app for tracking workouts effortlessly. Designed for both beginners and seasoned athletes, our app offers a seamless and user-friendly experience to help you stay on top of your fitness goals. Features: Intuitive Interface: Navigate through your workouts with ease. Extensive Exercise Library: Choose from a wide range of exercises to customize your routines. Built-in Rest Timer: Keep your workouts efficient with our integrated rest timer. Weight Tracking: Monitor your weight changes and progress over time. Personalized Calorie Insights: Get tailored insights to optimize your nutrition and fitness regime. Exercise Progression Tracking: Track your improvement and stay motivated with detailed progression reports. Unlimited Workout Templates: Save and create as many workout templates as you need to keep your routines fresh and effective. Download Optimize Fitness now and take the first step towards a healthier, stronger you!
BuiltDiff
Log your weightlifting sets and reps with a clean, distraction-free interface. Visualize your progress with charts and personalize the app's appearance. Enjoy offline functionality and a sign-up-free experience for efficient workouts.
- Log lifts, sets, and reps
- Create custom workout routines
- Offline functionality
- Sign-up-free experience
- Visualize progress with charts
- Personalize app appearance
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Track your lifts, sets, and reps and watch your strength soar! Enjoy a clean and simple design that makes navigation a breeze. Focus on your workout without any distractions, making your lifting sessions efficient and effective. Features: - watchOS companion app - Tailor your own workout routines - No internet connection needed - Sign up-free experience - Convenient keyboard add-ons for efficient logging of weights and reps - Permanent recording of all your lifts - Visualize your lifting progression through charts - Select your preferred color and personalize the app to make it uniquely yours
Screenshots
Verdict
The clearest difference is update cadence: BuiltDiff at every 2 weeks against Optimize Fitness's every 3 months. Optimize Fitness's advantage is iOS requirement (13.0 vs 17.0). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for Optimize Fitness against 5.0 for BuiltDiff. Both are backed by a comparable volume of ratings — 5 and 2 respectively.
Optimize Fitness ships an update every 3 months, BuiltDiff every 2 weeks. Both last shipped on November 4, 2026.
| Parameter | Optimize Fitness | BuiltDiff |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) | 5.0 (2 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 5 — better | 2 |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, Apple Watch — better |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 19 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Robert Harrington | Timmy Nguyen |
Customer experience
Optimize Fitness
BuiltDiff
In-app purchases
Optimize Fitness
No in-app purchases
BuiltDiff
No in-app purchases
