# SmartMS3 vs Fit Boss

The clearest difference is update cadence: Fit Boss at every 2 weeks against SmartMS3's every 6 months. On price, ads, in-app purchases and device support there is nothing between them.

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

SmartMS3 ships an update every 6 months, Fit Boss every 2 weeks. The most recent releases landed on September 15, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | SmartMS3 | Fit Boss |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/smartms3/id1645251903/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 22 MB | 32 MB |
| Requires iOS | 13.4 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Smart MS3 LLC](https://appshunter.io/developer/1527923246) | [Shijun Huang](https://appshunter.io/developer/1876090411) |

## What reviewers say

### SmartMS3

[App page](https://appshunter.io/ios/app/smartms3/id1645251903)

This app utilizes EMG sensor technology to monitor muscle activation during training and recovery. It provides insights into how your muscles are firing to optimize your fitness journey.

**Highlights:** EMG sensor technology, Muscle firing tracking, Training analysis, Recovery monitoring, Fitness optimization

**Features:** macOS Compatibility

**In-app purchases:** none


### Fit Boss

[App page](https://appshunter.io/ios/app/fit-boss/id6758968048)

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

**In-app purchases:** none


## Frequently asked questions

### Is SmartMS3 free?

SmartMS3 is free to download, with no in-app purchases.

### Is Fit Boss free?

Fit Boss is free to download, with no in-app purchases.

### Do SmartMS3 or Fit Boss have ads?

Neither SmartMS3 nor Fit Boss shows ads.

### Which is updated more often, SmartMS3 or Fit Boss?

SmartMS3 ships an update every 6 months, and Fit Boss every 2 weeks. Most recently, SmartMS3 was updated on September 15, 2026 and Fit Boss on September 16, 2026.

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