OpenRadiation vs RadexM
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Measure radioactivity levels
- Assess radiation exposure
- Contribute to citizen science
- Collaborative data database
- Share measurements
- View data online
Read full descriptionHide 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.
RadexM
This utility app enhances the functionality of RADEX devices by allowing easy settings adjustments and providing a history of measurements. View your data in graphical or tabular formats after connecting via Bluetooth.
- Bluetooth device connection
- Quick settings changes
- Measurement history tracking
- Graphical data display
- Tabular data display
Read full descriptionHide full description
The RadexM mobile application adds practical and valuable features to RADEX devices while making settings easier. Connection to devices is via Bluetooth. Right after installing the application you can quickly change the settings on the device, as well as see the history of measurements in the form of graphs or tables.
Screenshots
Verdict
The clearest difference is review sentiment: RadexM at 100% against OpenRadiation's 0%. RadexM also leads on rating (4.8 vs 2.0) and update cadence (monthly vs every 3 months). OpenRadiation's advantage is device support (3 vs 1). On price, ads, in-app purchases and monetization model 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
RadexM holds the better App Store score, 4.8 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 100% of RadexM's.
OpenRadiation ships an update every 3 months, RadexM monthly. The most recent releases landed on June 1, 2026 and September 16, 2026 respectively.
| Parameter | OpenRadiation | RadexM |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (4 ratings) | 4.8 (19 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 4 | 19 — better |
| Update frequency | Every 3 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 54 MB | 113 MB |
| Age rating | 4+ | 4+ |
| Developer | Autorite de surete nucleaire et de radioprotection | KVARTA-RAD, OOO |
Customer experience
OpenRadiation
RadexM
In-app purchases
OpenRadiation
No in-app purchases
RadexM
No in-app purchases








