Comparison

OpenRadiation vs GMCMap

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

Head to head
About

OpenRadiation

Measure ambient radioactivity levels and assess your exposure to ionizing radiation using a compatible sensor. Contribute to a citizen science project by sharing your measurements to build a collaborative database.

Highlights
  • Measure radioactivity levels
  • Assess radiation exposure
  • Contribute to citizen science
  • Collaborative data database
  • Share measurements
  • View data online
Features
Read full description

Looking to know the level of radioactivity around you and assess your exposure to ionising radiation? Thanks to this application, and a compatible sensor, you can measure radioactivity. You can also contribute to a citizen science project, by helping to create a collaborative data base of radioactivity measurements in the environment: OpenRadiation (published under an Open Database License). You will then be able to share your measurements using the application and view the data in the application or on the website www.openradiation.org. Create an account on the website www.openradiation.org, and obtain a compatible sensor (see the list of compatible sensors at www.openradiation.org). Activate Bluetooth under your mobile, configure your sensor to measure radioactivity, and publish your measurements. If you do not have a compatible sensor, you can always enter your measurements manually on the website or via the application. OpenRadiation currently brings together the following scientific and academic partners: IFFO-RME - training network in major educational risks -, IRSN - public expert in research and expertise on nuclear and radiological risks -, Planète Sciences – association contributing to the scientific and technical culture of young people - and SORBONNE UNIVERSITE Fablab - digital fabrication and rapid prototyping workshop, open to students, staff and the general public.

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

OpenRadiation4 screens
GMCMap4 screens

Verdict

The call

The clearest difference is review sentiment: GMCMap at 70% against OpenRadiation's 0%. GMCMap also leads on rating (4.1 vs 2.0) and ratings volume (19 vs 4). On price, update cadence, 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

GMCMap holds the better App Store score, 4.1 against 2.0. Both are backed by a comparable volume of ratings — 4 and 19 respectively. Written reviews point the same way: 0% of OpenRadiation's written reviews are positive against 70% of GMCMap's.

UpkeepUpdate frequency

OpenRadiation ships an update every 3 months, GMCMap every 5 months. The most recent releases landed on June 1, 2026 and September 22, 2026 respectively.

Scorecard3 real differences · 7 level
OpenRadiation versus GMCMap: the parameters behind the verdict, then further details
ParameterOpenRadiationGMCMap
PriceFreeFree
Rating2.0 (4 ratings)4.1 (19 ratings) — better
Positive reviews0.0% of reviews70.0% of reviews — better
Number of ratings419 — better
Update frequencyEvery 3 months — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size54 MB27 MB
Age rating4+4+
DeveloperAutorite de surete nucleaire et de radioprotectionGQ Electronics LLC

Customer experience

OpenRadiation

All ratings3 ratings
Positive0.0%
Neutral66.7%
Negative33.3%
Written reviews2 reviews
Positive0.0%
Neutral50.0%
Negative50.0%

GMCMap

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

In-app purchases

None

OpenRadiation

No in-app purchases

None

GMCMap

No in-app purchases

Questions

Is OpenRadiation free?
OpenRadiation 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, OpenRadiation or GMCMap?
GMCMap is rated higher. OpenRadiation averages 2.0 out of 5 from 4 ratings, while GMCMap averages 4.1 from 19 ratings.
Do OpenRadiation or GMCMap have ads?
Neither OpenRadiation nor GMCMap shows ads.
Which is updated more often, OpenRadiation or GMCMap?
OpenRadiation ships an update every 3 months, and GMCMap every 5 months. Most recently, OpenRadiation was updated on June 1, 2026 and GMCMap on September 22, 2026.

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