# GLTSO vs SmartMTR for FlexRadio

The clearest difference is in-app purchases: GLTSO at none against SmartMTR for FlexRadio's 1. GLTSO also leads on iOS requirement (15.1 vs 26.2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. SmartMTR for FlexRadio sells 1 in-app purchase, starting at $2.99 per month. GLTSO asks for nothing beyond the download.

GLTSO ships an update monthly, SmartMTR for FlexRadio every 5 weeks. The most recent releases landed on October 2, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | GLTSO | SmartMTR for FlexRadio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/smartmtr-for-flexradio/id6758765008/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 37 MB | 3 MB |
| Requires iOS | **15.1** | 26.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 17+ | 4+ |
| Developer | [emmanuel manent](https://appshunter.io/developer/1807113923) | [Dariusz Socha](https://appshunter.io/developer/1084171708) |

## What reviewers say

### GLTSO

[App page](https://appshunter.io/ios/app/gltso/id6748814951)

**Features:** macOS Compatibility

**In-app purchases:** none


### SmartMTR for FlexRadio

[App page](https://appshunter.io/ios/app/smartmtr-for-flexradio/id6758765008)

Transform your iOS device into a precise S-meter and control panel for FlexRadio transceivers. Monitor signal levels, adjust DSP filters, and control radio functions with intuitive gestures. Includes a demo mode for exploration.

**Highlights:** Precision S-meter with arc-band indicator, Dual-slice display for simultaneous monitoring, TX meters for RF Power, SWR, and Compression, Intuitive swipe gestures for radio control, Comprehensive DSP filter adjustments, Demo mode for exploration

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SmartMTR | $2.99 | per month |


## Frequently asked questions

### Is GLTSO free?

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

### Is SmartMTR for FlexRadio free?

SmartMTR for FlexRadio is free to download, with in-app purchases available.

### Do GLTSO or SmartMTR for FlexRadio have ads?

Neither GLTSO nor SmartMTR for FlexRadio shows ads.

### Which is updated more often, GLTSO or SmartMTR for FlexRadio?

GLTSO ships an update monthly, and SmartMTR for FlexRadio every 5 weeks. Most recently, GLTSO was updated on October 2, 2026 and SmartMTR for FlexRadio on October 1, 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.*