# S vs M

The clearest difference is update cadence: S at monthly against M's every 3 months. S also leads on iOS requirement (6.0 vs 12.0). 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.

S ships an update monthly, M every 3 months. The most recent releases landed on September 19, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | S | M |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/s-viewer/id824140331/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | Free | — |
| Size | 12 MB | 37 MB |
| Requires iOS | **6.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TSUNG JUNG HU](https://appshunter.io/developer/588252161) | [MATATALAB CO.,LTD.](https://appshunter.io/developer/1547380894) |

## What reviewers say

### S

[App page](https://appshunter.io/ios/app/s-viewer/id824140331)

This app allows you to view live images from a USB camera connected to a WiFi station wirelessly. You can capture, record, freeze, and annotate the video feed, and even switch to your iOS device's camera.

**Highlights:** Wireless USB camera transfer, Live image preview, Capture and record video, Freeze and draw on video, Switch camera resolutions, Adjust image quality (brightness), Use iOS device camera

**Features:** macOS Compatibility

**In-app purchases:** none


### M

[App page](https://appshunter.io/ios/app/m-scope/id6475326425)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is S free?

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

### Is M free?

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

### Do S or M have ads?

Neither S nor M shows ads.

### Which is updated more often, S or M?

S ships an update monthly, and M every 3 months. Most recently, S was updated on September 19, 2026 and M on September 29, 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.*