# GSM vs MTech Sonar

The clearest difference is iOS requirement: GSM at 6.0 against MTech Sonar's 15.0. 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.

## The numbers

| Metric | GSM | MTech Sonar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.4 (14 ratings)](https://appshunter.io/ios/app/mtech-sonar/id1376913731/reviews)** |
| Number of ratings | — | **14** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Fortnightly |
| Monetization | — | Free |
| Size | 3 MB | 104 MB |
| Requires iOS | **6.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [艳丽 刘](https://appshunter.io/developer/595252190) | [M-TECH SYSTEMS USA, INC.](https://appshunter.io/developer/1376913580) |

## What reviewers say

### GSM

[App page](https://appshunter.io/ios/app/gsm-dkey/id912114051)

**Features:** macOS Compatibility

**In-app purchases:** none


### MTech Sonar

[App page](https://appshunter.io/ios/app/mtech-sonar/id1376913731)

This app automates barn data collection for real-time monitoring of environmental conditions and bird health. It also tracks daily animal performance against established standards.

**Highlights:** Automated barn data collection, Real-time environment monitoring, Minute-by-minute bird health tracking, Daily animal performance trending, Performance comparison to standards

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

**In-app purchases:** none


## Frequently asked questions

### Is GSM free?

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

### Is MTech Sonar free?

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

### Do GSM or MTech Sonar have ads?

Neither GSM nor MTech Sonar shows ads.

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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.*