# On vs GMCMap

The clearest difference is rating: On at 4.4 against GMCMap's 4.1. On also leads on update cadence (monthly vs every 5 months). GMCMap's advantage is review sentiment (70% vs 50%). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

On holds the better App Store score, 4.4 against 4.1. Both are backed by a comparable volume of ratings — 13 and 19 respectively. Written reviews complicate that: 50% of On's written reviews are positive against 70% of GMCMap's, so the app with the better star average is not the one people write more warmly about.

On ships an update monthly, GMCMap every 5 months. The most recent releases landed on September 11, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | On | GMCMap |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (13 ratings)](https://appshunter.io/ios/app/on-air-net-scraper/id1536271710/reviews)** | [4.1 (19 ratings)](https://appshunter.io/ios/app/gmcmap/id6459882680/reviews) |
| Number of ratings | 13 | **19** |
| Positive reviews | 50.0% of reviews | **70.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 months |
| Monetization | Free | Free |
| Size | 32 MB | 27 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Christopher Robson](https://appshunter.io/developer/1536271712) | [GQ Electronics LLC](https://appshunter.io/developer/1379843069) |

## What reviewers say

### On

[App page](https://appshunter.io/ios/app/on-air-net-scraper/id1536271710)

This tool assists amateur radio operators with managing on-air nets and check-ins. It offers real-time messaging, email integration, and detailed operator information retrieval. The app supports multiple simultaneous sessions and configurable displays for efficient communication and tracking.

**Highlights:** Real-time net check-in tracking, Instant messaging (AIM) sessions, Integrated email client, Configurable information displays, QRZ/QRZCQ call sign lookup, WebSDR audio streaming, QRZ Logbook integration

**In-app purchases:** none


### GMCMap

[App page](https://appshunter.io/ios/app/gmcmap/id6459882680)

This app provides a real-time radiation map of the world, displaying current radiation levels from monitoring stations globally. It features an interactive map, historical data, and trend analysis for comprehensive environmental vigilance.

**Highlights:** Real-time radiation data, Global coverage map, Interactive map interface, Historical data and trends, Mobile convenience

**In-app purchases:** none


## Frequently asked questions

### Is On free?

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

### Is GMCMap free?

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

### Which has better reviews, On or GMCMap?

On is rated higher. On averages 4.4 out of 5 from 13 ratings, while GMCMap averages 4.1 from 19 ratings.

### Do On or GMCMap have ads?

Neither On nor GMCMap shows ads.

### Which is updated more often, On or GMCMap?

On ships an update monthly, and GMCMap every 5 months. Most recently, On was updated on September 11, 2026 and GMCMap on September 22, 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.*