StrongerLab vs BuiltDiff
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
StrongerLab
This app helps weight training enthusiasts track their progress and analyze their workout habits. It allows for custom workout creation, real-time recording with voice input, and detailed statistical analysis through graphs and charts. Data is stored locally on iCloud Drive.
- Custom workout creation
- Real-time exercise recording
- Voice input support
- Exercise pattern analysis
- Graphs and charts for statistics
- No registration required
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Hello, this is Strongerlab. It can be the best partner for those who love weight training. Use the app as a means of measuring yourself with your personal workouts. It will definitely help your training. It helps you to know your current status and exercise habits at a glance. No registration or login required. And it's fast and simple. It faithfully performs the role of an exercise assistant only with the functions provided by downloading the app. This is an early version now. We will continue to add many features. Work out and build your body with StrongerLab!! 1. Create training freely A basic training list is provided, but you can configure your own workout list by freely designating a name and type. You can create any kind of weight training training. For bare body workouts, additional weight can be recorded. 2. Recording function to help you focus on the exercise as much as possible I made it to record comfortably with a spinner-type UI that can be entered with one hand. You can fine-tune the steps of the spinner to suit your style. You can also record compound sets by selecting two exercises. You can record while exercising in real time, and you can freely write an exercise record by designating a specific date. You can check the maximum weight/volume while recording. It supports voice input. 3. Analyze exercise patterns with various data Check the exercise ratio for each part and sport with graphs and charts. Various statistics are provided based on the recorded data. Analyze your training patterns. We will continue to update detailed analysis tools. 4. Light, comfortable and fast There is no need to sign up or log in. You can use the app immediately after downloading it. Your data is safely stored on your icloud drive. - StrongerLab Philosophy Don't train to show off your weight training. You will want to get results quickly and you may not be able to live up to your expectations every time. You need to know how to focus on the exercise itself. Don't think too much in your head. The utopia rises every time, but the body does not develop. Don't judge yourself for changes in your body. When there is a change, the people around you will react first. Train consistently and persistently. You can see yourself changed. Once you start, go to the end.
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 iOS requirement: StrongerLab at 14.0 against BuiltDiff's 17.0. On price, rating, ratings volume and update cadence 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 StrongerLab against 5.0 for BuiltDiff. Both are backed by a comparable volume of ratings — 1 and 2 respectively.
StrongerLab ships an update every 3 weeks, BuiltDiff every 2 weeks. The most recent releases landed on September 29, 2026 and September 17, 2026 respectively.
| Parameter | StrongerLab | BuiltDiff |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (2 ratings) |
| Number of ratings | 1 | 2 — better |
| Update frequency | Every 3 weeks | 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 | 14.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 17 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Hyung Gyu Lee | Timmy Nguyen |
Customer experience
StrongerLab
BuiltDiff
In-app purchases
StrongerLab
No in-app purchases
BuiltDiff
No in-app purchases









