Comparison

On vs GMCMap

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

On

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
Read full description

On-Air Net Scraper "Personal" Pro is an iPhone/iPad/MacOS silicon App providing a wide range of features for Amateur Radio operators (Hams). Key features include NetLogger Amateur Radio On-Air Nets, Check-Ins and multiple Almost Instant Message (AIM) sessions in real-time data awareness. AIM pass key automatic email request with single button click resulting in immediate pass key information reply. Full integrated Email client for yet another method for Hams to carry out conversations. Multiple tabbed displays allowing user to track unlimited number of On-Air Net Check-Ins at one time. User configurable information displays to included viewing detailed Ham information within Check-In views. Near real-time AIM client text message send and receive. Searching and viewing Past NetLogger Nets and Check-Ins. Monitor mode so users can be aware of NetLogger Check-In "lurkers". Simultaneous QRZ and QRZCQ login is supported facilitating Call Sign lookup and Ham information retrieval. Easy, click to display NetLogger Nets, Check-Ins Call Sign and operator status information, not requiring QRZ/CQ accounts. Multi-screen displays to included improved 2-way and 3-way split screens provide simultaneous displays of Check-Ins, AIM, AIM and Net Scraper Message Exchange current listing data along with WebSDR viewing and listening. PERSISTENT WebSDR radio LIVE audio listenings while simultaneously viewing multiple Net Check-In views. Seamlessly integrates with On-Air Net Scraper Desktop Server WebSocket Interface supporting private Internet chat sessions between On-Air Net Scraper ME clients. JS8Call/WSJTX full participation in digital radio REAL-TIME texting when using NetBird VPN or when paired with On-Air Net Scraper's Message Exchange (ME) Server. Autoload favorite NetLogger nets. Callsign search both NetLogger Active and Past net listing, including improved automatic continuous search and displaying of matched nets. QRZ Logbook insert/update/delete. Supports On-Device authentication and Two-Factor authentication in addition to encrypted secure storage of sensitive data and app access security. JS8Call dynamic frequency adjustment.

About

GMCMap

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
Read full description

GMCMap, is your go-to mobile app for providing users with a real-time radiation world map. Designed to offer a comprehensive and up-to-date view of global radiation levels, this user-friendly and accessible tool is an essential resource for individuals, organizations, and authorities concerned with monitoring and understanding radiation patterns across the world. Key Features: Mobile Convenience: Access GMCMap seamlessly on your mobile device. Stay updated with real-time radiation data, whether you're at home or on the go. Real-Time Data: GMCMap harnesses the power of advanced technology and data sources to present real-time radiation measurements from various monitoring stations worldwide. Users can access the latest information, enabling them to respond swiftly to any potential radiation-related incidents or track ongoing situations. Global Coverage: With extensive coverage encompassing regions from densely populated urban centers to remote locations, the platform offers an accurate portrayal of radiation levels on a global scale. It allows users to visualize the distribution of radiation and assess potential risks at different locations. Interactive Map Interface: The interactive map interface of GMCMap allows users to explore radiation data effortlessly. Users can zoom in to view specific areas in greater detail or zoom out for a broader perspective of the global radiation situation. By clicking on individual monitoring points, users can access more detailed information about the specific radiation levels at that location. Radiation Trends and Analysis: GMCMap doesn't only provide instantaneous radiation levels; it also offers historical data and trend analysis, allowing users to track long-term changes and fluctuations in radiation levels. This feature can be particularly valuable for researchers, policymakers, and environmental agencies studying radiation patterns and their potential impact. GMCMap is an indispensable tool for radiation monitoring, research, and environmental vigilance. Download the app now and empower yourself to make informed decisions, contribute to a safer world, and protect what matters most.

Screenshots

On4 screens
GMCMap4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard3 real differences · 7 level
On versus GMCMap: the parameters behind the verdict, then further details
ParameterOnGMCMap
PriceFreeFree
Rating4.4 (13 ratings) — better4.1 (19 ratings)
Positive reviews50.0% of reviews70.0% of reviews — better
Number of ratings1319 — better
Update frequencyMonthly — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS15.615.1 — better
Further details — not scored
Size32 MB27 MB
Age rating17+4+
DeveloperChristopher RobsonGQ Electronics LLC

Customer experience

On

All ratings13 ratings
Positive84.6%
Neutral7.7%
Negative7.7%
Written reviews8 reviews
Positive50.0%
Neutral12.5%
Negative37.5%

GMCMap

All ratings19 ratings
Positive78.9%
Neutral0.0%
Negative21.1%
Written reviews10 reviews
Positive70.0%
Neutral0.0%
Negative30.0%

In-app purchases

None

On

No in-app purchases

None

GMCMap

No in-app purchases

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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