Sonar Fit vs Weight Gain Tracker
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Sonar Fit
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Train smarter. Move better. Track every rep effortlessly. Sonar Fit turns your Apple Watch and AirPods Pro into intelligent workout companions, using built-in motion sensors and AI to automatically count reps, track sets, and optimize your rest β so you can focus on lifting, not logging. WHAT IS SONAR FIT Sonar Fit is a next-generation strength training app designed for iPhone and Apple Watch. It uses real-time motion data and machine learning to automatically detect your reps, sets, and rest periods β hands-free. Whether youβre doing squats, deadlifts, presses, or curls, Sonar Fit recognizes your movements and keeps track of your workout without needing to tap your watch or phone. It even uses your AirPods Pro (2nd Gen or newer) for head-motion tracking if youβre not wearing your watch. KEY FEATURES - Automatic Rep Counting β No manual input required. Your Watch or AirPods detect each clean rep. - Real-Time Feedback β Instantly see your progress on Watch or iPhone during a workout. - Hands-Free Rest Timer β Rest starts automatically when your set ends. - Smart Set Tracking β View reps, sets, and history without lifting a finger. - Watch and AirPods Support β Use either device, or both. You choose. WHO ITβS FOR Sonar Fit is built for people who lift: - In home gyms or commercial gyms - Without a training partner - Who want to avoid tapping screens mid-set - Who care about form, focus, and tracking their progress over time WHY SONAR FIT IS DIFFERENT Unlike traditional fitness trackers or rep counters, Sonar Fit doesnβt rely on you to manually press buttons or enter numbers. Instead, it uses sensor data from your Apple Watch or AirPods Pro to recognise reps and intelligently guide your rest. We believe in frictionless training. No distractions. No guesswork. Just better sessions. DEVICE COMPATIBILITY - Apple Watch Series 6 or newer is recommended for best motion accuracy. - AirPods Pro (2nd Gen or newer) & AirPods Max are supported for head motion tracking. - iPhone required to install the Watch app. - Requires iOS 17+ and watchOS 10+. PRIVACY-FIRST We donβt sell your data β and your workouts stay securely stored in your private account. GET STARTED FREE Sonar Fit is free. Just install the app, connect your Apple Watch or AirPods, and start moving. QUESTIONS OR FEEDBACK? Weβre always improving. If you have questions, feedback, or want to request a feature, get in touch at help@sonar.fit Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Weight Gain Tracker
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Eating more is easy advice. Knowing how much to eat and when to adjust is the hard part. BulkBro is a calorie and weight-gain coach built for people who struggle to gain weight consistently. It creates a starting calorie target, helps you track each day, and uses your completed week and weigh-in to guide your next target. THE WEEKLY BULKING LOOP LOG β HIT TARGET β COMPLETE WEEK β WEIGH IN β EVALUATE β ADJUST A TARGET BUILT AROUND YOU Create a starting plan from your current stats, activity level, and preferred rate of gain. BulkBro turns that plan into one clear daily calorie target. ADAPT TO YOUR REAL RESULTS After seven completed days and a weigh-in, BulkBro compares your average intake with your weight response. Your next target can adjust when you are behind pace, on pace, or gaining faster than intended. LOG MEALS WITHOUT THE MATH Snap or choose a meal photo, type a description, use voice input, or enter calories manually. Review AI-assisted nutrition estimates before saving, reuse saved meals, and keep your daily total in view. SEE THE WHOLE BULK Track calories, protein, daily consistency, weigh-ins, weight trends, completed weeks, and calorie-target history in one focused progress view. STAY CONSISTENT Optional reminders help you log meals, complete each day, and remember weekly weigh-ins. BulkBro keeps your current target and next action clear. SUBSCRIPTION DETAILS BulkBro includes two complete feedback cycles. After those cycles, a subscription is required when you next log food so BulkBro can continue tracking and adapting your plan. BulkBro Pro is available as monthly and annual auto-renewable subscriptions. Current prices and billing periods are shown before purchase. Payment is charged to your Apple Account at confirmation. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. You can manage or cancel your subscription in your Apple Account settings. BulkBro provides general fitness and nutrition guidance, not medical advice. Results vary, and meal estimates should be reviewed before saving. Privacy Policy: https://kennethdegeest.github.io/app-portfolio-website/apps/bulkbro/privacy.html Terms of Use: https://kennethdegeest.github.io/app-portfolio-website/apps/bulkbro/terms.html Health Disclaimer: https://kennethdegeest.github.io/app-portfolio-website/apps/bulkbro/health.html
Screenshots
Verdict
The clearest difference is iOS requirement: Sonar Fit at 17.6 against Weight Gain Tracker's 26.4. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Sonar Fit sells 2 in-app purchases, starting at $3.99 per month and Weight Gain Tracker sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.
Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on November 8, 2026 and November 13, 2026 respectively.
| Parameter | Sonar Fit | Weight Gain Tracker |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, Apple Watch β better | iPhone |
| Requires iOS | 17.6 β better | 26.4 |
| Further details β not scored | ||
| Size | 11 MB | 41 MB |
| Age rating | 4+ | 12+ |
| Developer | Floxx Labs | Kenneth M. S. De Geest |
In-app purchases
Sonar Fit
- Unlimited Access$3.991 Month
- Unlimited access$29.991 Year
Weight Gain Tracker
- BulkBro Monthly$7.991 Month
- BulkBro Yearly$44.991 Year
Questions
Is Sonar Fit free?
Is Weight Gain Tracker free?
Do Sonar Fit or Weight Gain Tracker have ads?
Which is updated more often, Sonar Fit or Weight Gain Tracker?
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