BuiltDiff vs Sterk.
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
Sterk.
Effortlessly log your exercise sets with intelligent predictions and review comprehensive statistics for each movement and training session. This streamlined application is designed to help you achieve your fitness objectives.
- Smart set prediction
- Detailed exercise stats
- Workout logging
- Intuitive interface
- Fitness goal tracking
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Sterk makes tracking your workouts easy. Log your sets quickly with smart set prediction and check out detailed stats for every exercise and workout. It’s minimal, intuitive, and designed to help you stay on top of your fitness goals.
Screenshots
Verdict
The clearest difference is rating: BuiltDiff at 5.0 against Sterk.'s 4.6. Sterk.'s advantage is iOS requirement (15.1 vs 17.0). On price, ratings volume, 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. Neither carries in-app purchases, so what you see is what you pay.
BuiltDiff holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 2 and 5 respectively.
BuiltDiff ships an update every 2 weeks, Sterk. every 3 weeks. The most recent releases landed on June 11, 2026 and August 12, 2026 respectively.
| Parameter | BuiltDiff | Sterk. |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 4.6 (5 ratings) |
| Positive reviews | — | 80.0% of reviews |
| Number of ratings | 2 | 5 — better |
| Update frequency | Every 2 weeks — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 17.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 3 MB | 57 MB |
| Age rating | 4+ | 4+ |
| Developer | Timmy Nguyen | Thomas Theodor Corne Rooskens |
Customer experience
BuiltDiff
Sterk.
In-app purchases
BuiltDiff
No in-app purchases
Sterk.
No in-app purchases
