# OpenRadiation vs CyanSensor

The clearest difference is update cadence: CyanSensor at every 2 weeks against OpenRadiation's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

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

OpenRadiation ships an update every 3 months, CyanSensor every 2 weeks. The most recent releases landed on June 1, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | OpenRadiation | CyanSensor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (4 ratings)](https://appshunter.io/ios/app/openradiation/id1246249831/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 54 MB | 79 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Autorite de surete nucleaire et de radioprotection](https://appshunter.io/developer/1861431469) | [AirCarto](https://appshunter.io/developer/1867723261) |

## What reviewers say

### OpenRadiation

[App page](https://appshunter.io/ios/app/openradiation/id1246249831)

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:** macOS Compatibility

**In-app purchases:** none


### CyanSensor

[App page](https://appshunter.io/ios/app/cyansensor/id6757758735)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is OpenRadiation free?

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

### Is CyanSensor free?

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

### Do OpenRadiation or CyanSensor have ads?

Neither OpenRadiation nor CyanSensor shows ads.

### Which is updated more often, OpenRadiation or CyanSensor?

OpenRadiation ships an update every 3 months, and CyanSensor every 2 weeks. Most recently, OpenRadiation was updated on June 1, 2026 and CyanSensor on September 23, 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.*