MuscleMusic vs InteroHB
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MuscleMusic
This app offers mental health support for artists and performers, providing strategies for stage fright and anxiety. It includes a nervous system resilience tracker, masterclass content, and community features.
- Stage fright and anxiety strategies
- Nervous system resilience tracking
- Masterclass content
- Community features
- Progress tracking
- Offline sync
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Muscle Music is a mental health app for artists and performers. It includes strategies to overcome stage fright and anxiety and a tracking feature in which artists can track their nervous system resilience. This app had a complete masterclass, shifting cards for backstage, community, and a tracking device. INFORMATION ABOUT THE APP AND PURCHASE OPTIONS By signing up, you will get access to subscription(s) that include features such as progress tracking, and offline sync. The download of MuscleMusic is free of charge. No free trial offered. Should you use MuscleMusic app to access in-app content via available subscription(s), a payment will be charged to your credit card through your App Store account . A subscription renews automatically unless canceled at least 24 hours prior to the end of the subscription period. There is no increase in price when renewing. Subscription(s) can be managed and auto-renewal turned off in Account Settings in the App Store after purchase. Read our full Terms of Service and our Privacy Policy: https://passion.io/terms-of-service https://passion.io/privacy-policy
InteroHB
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Train your inner awareness. InteroHB helps you build a stronger connection between your mind and body by helping you practice your ability to sense and count your heart beat. Through simple, guided sessions, you'll practice interoception - your ability to perceive your body's internal signals. FEATURES • Sense Notice and count your heart beat. Compare it to readings from consumer fitness devices to improve your internal accuracy over time. • Flow Practice observing your heart beat changes over time with guided sessions designed to build observational awareness. • Interoceptive Index Track your overall internal awareness with a single, easy-to-understand number. • Trends & Insights See your progress, understand your patterns, and identify what improves your performance. • Bluetooth and Apple Watch Heart Rate Support Connect consumer compatible heart rate devices for comparison of your sensing. Required for this app to function. DESIGNED FOR • Athletes and performance training • Stress regulation and management • Mindfulness and self-awareness Privacy Policy: https://www.interohb.com/privacy.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ IMPORTANT InteroHB is not a medical device. A consumer compatible Bluetooth heart rate device or compatible Apple Watch is required for full functionality.
Screenshots
Verdict
The clearest difference is ads: InteroHB at none against MuscleMusic's shown. MuscleMusic's advantage is update cadence (every 6 weeks vs every 5 months) and iOS requirement (15.1 vs 26.2). On price, in-app purchases and device support 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. MuscleMusic sells 8 in-app purchases, starting at $8.99 per 7 days and InteroHB sells 1 in-app purchase, starting at $9.99 per year. Whichever you choose, the download price is not the number that matters.
MuscleMusic ships an update every 6 weeks, InteroHB every 5 months. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.
| Parameter | MuscleMusic | InteroHB |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (13 ratings) — better | — |
| Positive reviews | 80.0% of reviews | — |
| Number of ratings | 13 — better | — |
| Update frequency | Every 6 weeks — better | Every 5 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, Apple Watch |
| Requires iOS | 15.1 — better | 26.2 |
| Further details — not scored | ||
| Size | 88 MB | 7 MB |
| Age rating | 17+ | 4+ |
| Developer | Ruby Fox | Chad Miller |
In-app purchases
MuscleMusic
- Weekly$8.997 Days
- Monthly Membership7 Days trial$9.991 Month
- Subscription$9.991 Month
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- Basic App Plan$9.991 Month
- UNLIMITED ZOOMS$19.001 Month
- Subscription$34.996 Months
- Subscription$49.991 Month
- One Time Subscription$49.99
InteroHB
- InteroHB Premium - Yearly1 Month trial$9.991 Year









