# GSM 3G M2M RTU vs SWLtools

The clearest difference is price: GSM 3G M2M RTU at Free against SWLtools's $3.99. GSM 3G M2M RTU also leads on iOS requirement (7.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

GSM 3G M2M RTU is free to download; SWLtools costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | GSM 3G M2M RTU | SWLtools |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 2 months |
| Monetization | — | Paid |
| Size | 7 MB | 5 MB |
| Requires iOS | **7.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [朝山 马](https://appshunter.io/developer/596304901) | [Stefano Rampazzo](https://appshunter.io/developer/396660919) |

## What reviewers say

### GSM 3G M2M RTU

[App page](https://appshunter.io/ios/app/gsm-3g-m2m-rtu/id1095288504)

**Features:** macOS Compatibility

**In-app purchases:** none


### SWLtools

[App page](https://appshunter.io/ios/app/swltools/id6618146941)

Enhance your shortwave listening with this app that decodes on-air text modes like Morse, RTTY, and WEFAX. It also features spectrum analysis, audio recording, and is optimized for portable use with specific receivers.

**Highlights:** Decode Morse, RTTY, WEFAX, and ACARS, Real-time spectrum and spectrogram display, Audio recording and storage, Save and share decoded text, Optimized for Belka receiver, ACARS position mapping

**In-app purchases:** none


## Frequently asked questions

### Is GSM 3G M2M RTU free?

GSM 3G M2M RTU is free to download, with no in-app purchases.

### Is SWLtools free?

SWLtools costs $3.99, with no in-app purchases.

### Do GSM 3G M2M RTU or SWLtools have ads?

Neither GSM 3G M2M RTU nor SWLtools 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.*