# mTrigger Muscle Ball vs Calf Raise

The clearest difference is review sentiment: mTrigger Muscle Ball at 67% against Calf Raise's 20%. mTrigger Muscle Ball also leads on rating (4.3 vs 3.9). Calf Raise's advantage is update cadence (monthly vs every 5 months) and ratings volume (16 vs 4). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

mTrigger Muscle Ball holds the better App Store score, 4.3 against 3.9. Both are backed by a comparable volume of ratings — 4 and 16 respectively. Written reviews point the same way: 67% of mTrigger Muscle Ball's written reviews are positive against 20% of Calf Raise's.

mTrigger Muscle Ball ships an update every 5 months, Calf Raise monthly. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | mTrigger Muscle Ball | Calf Raise |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (4 ratings)](https://appshunter.io/ios/app/mtrigger-muscle-ball/id1436093951/reviews)** | [3.9 (16 ratings)](https://appshunter.io/ios/app/calf-raise/id1507737701/reviews) |
| Number of ratings | 4 | **16** |
| Positive reviews | **66.7% of reviews** | 20.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Free | Free |
| Size | 76 MB | 30 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [mTrigger](https://appshunter.io/developer/1240335568) | [Kim Hebert-Losier](https://appshunter.io/developer/1507737700) |

## What reviewers say

### mTrigger Muscle Ball

[App page](https://appshunter.io/ios/app/mtrigger-muscle-ball/id1436093951)

Turn your muscle exercises into an interactive game. Control in-game elements by engaging specific muscle groups with a compatible biofeedback device. Navigate challenges and reach goals through targeted muscle activation.

**Highlights:** Gamified biofeedback therapy, Use muscle exercises as game controller, Navigate labyrinth challenges, Variety of tracks based on muscle groups, Adjust time parameters and reps

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Calf Raise

[App page](https://appshunter.io/ios/app/calf-raise/id1507737701)

This app uses your device's camera to analyze calf raise performance through video. It measures height, power, and work, and calculates a fatigue index. Track progress over time and compare left and right leg performance.

**Highlights:** Video analysis of calf raises, Measures heel height, power, and work, Calculates fatigue index, Supports external load for strength testing, Multi-user support, Data export to CSV, Integrated metronome

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is mTrigger Muscle Ball free?

mTrigger Muscle Ball is free to download, with no in-app purchases.

### Is Calf Raise free?

Calf Raise is free to download, with no in-app purchases.

### Which has better reviews, mTrigger Muscle Ball or Calf Raise?

mTrigger Muscle Ball is rated higher. mTrigger Muscle Ball averages 4.3 out of 5 from 4 ratings, while Calf Raise averages 3.9 from 16 ratings.

### Do mTrigger Muscle Ball or Calf Raise have ads?

Neither mTrigger Muscle Ball nor Calf Raise shows ads.

### Which is updated more often, mTrigger Muscle Ball or Calf Raise?

mTrigger Muscle Ball ships an update every 5 months, and Calf Raise monthly. Most recently, mTrigger Muscle Ball was updated on November 6, 2026 and Calf Raise on November 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*