Sonar vs Variable Resistance Training
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sonar
Unify data from all your wearables and lifestyle trackers to gain personalized health insights. Understand your sleep, recovery, stress, and activity with AI-powered analysis and daily guidance to optimize your well-being.
- Syncs with multiple wearables and apps
- AI-powered personalized health insights
- Daily scores for recovery, sleep, and stress
- Detailed training analytics
- 24/7 vitals monitoring
- Tailored health recommendations
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Your body is talking. Are you listening? Sonar unifies all of your wearables, lifestyle, and biomarker data to unlock personalized insights and detection once reserved for elite athletes and biohackers. Trusted by 250,000+ users across 170+ countries, Sonar helps you cut through the noise across sleep, recovery, stress, activity, and nutrition - so you can focus on what actually matters. Sonar isn't just another health tracker. It merges the latest medical, sports and data science with AI engines that continuously surface subtle shifts and patterns across millions of data points, helping you know when to push, when to pause, and where to focus next. FEATURES: Personalized intelligence Sonar AI is a personal health agent grounded in the data across your wearables, health apps, and connected devices. Ask questions, understand changes in your scores, and get answers that reflect your actual data - not generic advice. Sonar AI also remembers personal context you give it like training goals, travel, or new routines, and factors it into how it interprets your data over time. Sync everything Fragmented data means missed signals. Connect Apple Watch, Garmin, Oura, Fitbit, Strava, Withings, MyFitnessPal, Peloton and many more. Daily scores and guidance Recovery, Strain, Sleep, Stress, Energy, and Nutrition scores help you understand your day at a glance, with practical guidance to improve. Correlations & comparisons See how any two metrics relate over time. Plot exercise against sleep, alcohol against HRV, or stress against recovery to surface the patterns driving how you feel each day. Compare up to six metrics at once, or focus the view on a single category like activity, sleep, or recovery. 24/7 vitals monitoring Track trends in HRV, resting heart rate, respiratory rate, blood oxygen, body temperature, and more, and get notified when values move outside your typical range. Training analytics All workouts in one place, with detailed summaries, heart rate zones, and training load and balance to help you build fitness without burnout. Widgets, Apple Watch & desktop app Keep Sonar close with beautiful widgets and an Apple Watch app, and explore your data on the big screen at www.sonarhealth.co Peer benchmarks See how you compare to people like you (and the broader community) across key metrics. Make it yours Choose the sections, metrics, wallpapers, and views that matter most to you, including a Favorites view for the health data you care about most. Tailored recommendations Add your medications, family history, and conditions to receive personalized checkup, vaccine, and screening recommendations based on age, sex, history, and the latest medical guidance. PUTTING PRIVACY FIRST Your health data is yours - we do not sell personal data. Our goal is to build an experience our users love, and all product and architecture decisions are built around maximizing user privacy. SUBSCRIPTION AND TERMS Sonar offers a meaningful free experience, empowering you to start transforming your health today with no strings attached. Current-day Recovery, Sleep, Strain, and Nutrition scores are free for all users. It's all part of our mission to accelerate longer, healthier, and happier lives globally. If you're looking to take your health journey to the next level, you can upgrade to Sonar Pro at any time for access to a suite of powerful features we think you'll love. Always consult with your doctor prior to making any medical decisions. Privacy Policy: https://www.sonarhealth.co/legal/privacy-policy/ Terms of Service: https://www.sonarhealth.co/legal/terms-of-service/
Variable Resistance Training
This app offers advanced tracking for resistance band workouts, automatically calculating resistance and progression based on your saved equipment. It also supports tracking weights and calisthenics, providing detailed analytics and a video library for exercise demonstrations.
- Automatic band resistance calculation
- Dynamic resistance progression generation
- Weight and calisthenics tracking
- Full video exercise library
- Detailed analytics and progress charts
- Customizable rest timer
- Superset functionality
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The most advanced resistance band training app is here. Track bands, weights, calisthenics, and sliding bench trainers - all in one app with an intuitive, user-friendly interface. Automatically calculate band resistance and generate a resistance progression based on your saved equipment. Train smarter, see real progress, and stay consistent every session. Unlike generic fitness apps, Variable Resistance Training is the only app that combines true VRT tracking with weights, calisthenics, and sliding bench trainers, making it a complete solution for all strength and bodyweight training. Revolutionary Automatic Band Progression: - Add your bands (or any combination) to your Saved Equipment List - The app automatically generates a dynamic progression list from lowest to highest resistance, showing exact band or stacked band combinations for each resistance level - Band prestretch values are automatically calculated based on your equipment dimensions, giving you an additional difficulty indicator - Tap + / - during your workout and the app instantly updates resistance and selects the correct band or stacked combination, removing all guesswork - Works with any bands - Flexible, intuitive design makes adding/removing exercises, sets, and progression adjustments effortless Track Weights, Calisthenics, & Sliding Bench Trainers: - Standard bodyweight exercises (no equipment needed) - Assisted calisthenics using bands for support - Weighted exercises alongside your VRT workouts - Sliding bench trainers including level and added resistance Other Key Features: - Band Video Library – Clear demonstrations for VRT exercises - Robust Equipment Library – Pre-loaded with data from leading band systems, fully compatible with any resistance band or product - Custom Exercises & Programs – Build your own routines or adapt existing ones easily - Advanced Logging – Track sets, reps, RPE, resistance levels, and workout history - Customizable Rest Timer – Set and adjust rest periods for each exercise or set, with flexible options to match your workout pace - Detailed Analytics – See progress charts and track performance over time - Supports All Training Styles – Resistance bands, weights, calisthenics, and sliding bench trainers - Smarter Progression – Measure your true training load, remove guesswork, and make consistent gains - Superset Functionality – Link exercises and autoatically switch between them for seemless set tracking - Extremely User-Friendly UI – Effortlessly navigate workouts, progressions, exercises, and sets with flexible controls Why choose Variable Resistance Training? - Only app with true prestretch-based resistance tracking - Only app with automatic band progression from saved equipment - Only app that tracks bands, weights, calisthenics, and sliding bench trainers - Only app that combines powerful features with an extremely user-friendly, flexible interface for effortless tracking Whether your goal is building muscle, improving mobility, or training at home, Variable Resistance Training gives you the most versatile, accurate, and complete strength tracking system available for training with various modalities. Note: A subscription is required to continue using Variable Resistance Training after your 1-month free trial. Terms of Service: https://vrt-app.com/terms-of-service/ Privacy Policy: https://vrt-app.com/privacy-policy/ https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: Sonar at 4.6 against Variable Resistance Training's 4.0. Sonar also leads on ads (none vs shown) and ratings volume (336 vs 4). On price, update cadence, in-app purchases and monetization model 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. Sonar sells 7 in-app purchases, starting at $5.99 per month and Variable Resistance Training sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
Sonar holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: Sonar has 336 ratings behind it against 4, so its average is the more settled of the two.
Sonar ships an update weekly, Variable Resistance Training every 6 days. The most recent releases landed on October 21, 2026 and October 10, 2026 respectively.
| Parameter | Sonar | Variable Resistance Training |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (336 ratings) — better | 4.0 (4 ratings) |
| Positive reviews | 67.5% of reviews | — |
| Number of ratings | 336 — better | 4 |
| Update frequency | Weekly | Every 6 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone, Apple Watch | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 117 MB | 97 MB |
| Age rating | 4+ | 4+ |
| Developer | Sonar Health, Inc. | Andrew Soumbos |
Customer experience
Sonar
Variable Resistance Training
Bugs and requests
Sonar
Reported bugs
3 issues- Inconsistent data syncing
- Crashes and freezes
- Unreliable notifications
Requested features
4 requests- Customizable widgets
- Deeper data analysis and insights
- Improved historical data tracking
- Integration with more wearable devices
Variable Resistance Training
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Sonar
- Sonar Pro - Monthly (Legacy)7 Days trial$5.991 Month
- Sonar Pro - Monthly7 Days trial$5.991 Month
- Sonar Pro - Annual (Legacy)7 Days trial$49.991 Year
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- Sonar Pro - Annual7 Days trial$49.991 Year
- Sonar Pro - Lifetime$199.99
- Sonar Pro - Lifetime$249.99
- Sonar Pro - Lifetime$299.99
Variable Resistance Training
- VRT Monthly1 Month trial$3.991 Month
- VRT Annual1 Month trial$39.991 Year
- VRT Lifetime Pro$149.99
Questions
Is Sonar free?
Is Variable Resistance Training free?
Which has better reviews, Sonar or Variable Resistance Training?
Do Sonar or Variable Resistance Training have ads?
Which is updated more often, Sonar or Variable Resistance Training?
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