SimpleFit vs BuiltDiff
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SimpleFit
This app offers personalized, adaptive workout and nutrition plans based on your goals, schedule, and available equipment. It features an interactive player with video guides and extensive customization options for over 500 exercises.
- Personalized questionnaire for goal setting
- Adaptive long-term workout programs
- Flexible workouts tailored to daily needs
- Interactive workout player with video/audio
- Extensive exercise library (500+ exercises)
- Personalized nutrition program
- Detailed progress tracking
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Welcome to SimpleFit, where your fitness aspirations meet personalized, adaptive training and nutritional guidance. Our app is designed to revolutionize your workout experience, tailoring every aspect to your individual goals and lifestyle. UNIQUE PERSONALIZATION THROUGH QUESTIONNAIRE - Start with our comprehensive questionnaire, designed to understand your fitness goals, be it muscle gain, weight loss, strength enhancement, mobility improvement, powerlifting, or calisthenics skills. - Tailor your workout environment to your training location and available equipment, whether it's a gym, home, traveling, or no-equipment scenarios. - Get nutritional guidance aligned with your dietary habits and goals. - Tell us your available schedule, and we craft a workout plan that fits perfectly into your life. ADAPTIVE LONG-TERM PROGRAM WITH PERIODIZATION - Engage in a dynamic, long-term workout program that uses periodization to focus on your goals. - As you progress, the program adapts, ensuring you always have challenging workouts. FLEXIBLE WORKOUTS TAILORED TO DAILY NEEDS - Adjust your workouts based on your daily location, available equipment, training duration, and preferences. - Select, swap, and reorder exercises to fit your needs for each session. INTERACTIVE WORKOUT PLAYER - Experience our workout player with video and audio instructions for each exercise. - Benefit from automated timers, track your weights and repetitions, and access quick form cues. - Edit, add, or reorder exercises during your workout for a customized experience. EXTENSIVE CUSTOMIZATION OPTIONS - Choose from over 500 exercises in our extensive library, each detailed with instructions and correct execution tips. - Enjoy full freedom to create and edit your workouts and workout program. PERSONALIZED NUTRITION PROGRAM - Receive recommendations on calorie intake and macro values, tailored to your fitness goals. - Access important information on nutrition to optimally fuel your body. DETAILED PROGRESS TRACKING - Track your progress with comprehensive statistics for every workout and exercise. - View detailed logs to monitor your advancement over time. Email: info@simple-fit.app Support: https://www.app.simple-fit.app/support Privacy Policy: https://www.simple-fit.app/privacy Terms of Service: https://www.simple-fit.app/tos
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 in-app purchases: BuiltDiff at none against SimpleFit's 3. SimpleFit's advantage is ratings volume (49 vs 2) and iOS requirement (15.6 vs 17.0). On price, rating, update cadence 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. SimpleFit sells 3 in-app purchases, starting at $9.99 per month. BuiltDiff asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.9 for SimpleFit against 5.0 for BuiltDiff. That said, the two scores are not equally well evidenced: SimpleFit has 49 ratings behind it against 2, so its average is the more settled of the two.
SimpleFit ships an update fortnightly, BuiltDiff every 2 weeks. The most recent releases landed on September 8, 2026 and June 11, 2026 respectively.
| Parameter | SimpleFit | BuiltDiff |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (49 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 49 — better | 2 |
| Update frequency | Fortnightly — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | Free — better |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad, Apple Watch |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 224 MB | 3 MB |
| Age rating | 12+ | 4+ |
| Developer | Jonas Wallmann | Timmy Nguyen |
Customer experience
SimpleFit
BuiltDiff
In-app purchases
SimpleFit
- Premium Monthly7 Days trial$9.991 Month
- Premium 3 Months7 Days trial$24.993 Months
- Premium Annual7 Days trial$69.991 Year
BuiltDiff
No in-app purchases
Questions
Is SimpleFit free?
Is BuiltDiff free?
Which has better reviews, SimpleFit or BuiltDiff?
Do SimpleFit or BuiltDiff have ads?
Which is updated more often, SimpleFit or BuiltDiff?
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