# Radiation Map Tracker displays worldwide radiation — Via our network of sensors

> Real-time global radiation map from volunteer sensor network. (iPhone/iPad app by Black Cat Systems.)

- Source: https://appshunter.io/ios/app/radiation-map-tracker-displays-worldwide-radiation/id427091720 (this page in markdown: same URL + `.md`)
- Developer: [Black Cat Systems](https://appshunter.io/developer/301047032)
- Category: Weather, Lifestyle
- Price: $0.99
- Rating: 3.90/5 from 11 App Store ratings · 32 written reviews indexed
- Age rating: 4+
- Requires: iOS 6.0 · 1 MB
- Languages: American English
- Released: 2011-03-25
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/radiation-map-tracker-displays-worldwide-radiation/id427091720/reviews.md

## What is Radiation Map Tracker displays worldwide radiation?

Concerned about nuclear radiation levels, due to fallout from damaged nuclear reactors, nuclear tests, or other events? 

Radiation Map Tracker connects to our extensive network of constantly updating, real time, nuclear radiation detectors, all run by volunteers, not government agencies. This app lets you determine what levels of radiation are being reported at various locations around the world. You can scroll around the map and zoom in on readings. Readings are continuously updated every few minutes. 

It displays the current ionizing radiation reading from these detectors on an easy to use world map, in uR/hr, one of the standard units of measurement for radiation. You can scroll around and zoom in to your area. Typical background (naturally occurring) radiation values near sea level are in the 10 to 20 uR/hr range. Higher readings naturally occur at higher elevations due to cosmic rays from outer space.

Tapping on one of the readings will bring up a chart of the last few days worth of readings. You can even smooth out the variations by adjusting the number of samples averaged per plotted point, to bring out subtle variations. 

Buy a copy of Radiation Map Tracker, and you'll never be in the dark about nuclear radiation levels again.

## Key features

- Worldwide radiation sensor network
- Real-time radiation readings
- Interactive world map display
- Zoomable location data
- Historical reading charts
- Adjustable data smoothing

## Recent user reviews (10 of 32)

All indexed reviews: https://appshunter.io/ios/app/radiation-map-tracker-displays-worldwide-radiation/id427091720/reviews.md

### 1/5 — Bad app

*2024-10-09*

Map is displayed 
No radiation readings 
Do not buy
App is broken

### 1/5 — I should have read the reviews.

*2023-07-30*

As a proof of concept it would have been ok if it was free, but zero is exactly what it’s worth.

### 1/5 — Don’t bother

*2022-07-05*

The app shows very few counters so few world wide it is not worth it. You can find better data on the web.

### 4/5 — Monitoring Glen Rose Plant

*2019-07-29, version 1.3*

I started using this app while researching radiation exposure planning. With a nuclear plant nearby, I had discovered reports of high levels of over 300 for several days a few years back. The reports were from the public and stated even with multiple calls to the plant (one posing as a higher govt agency), no release of information was given out to the public. 
As I searched, this was the only option I found for real time monitoring. There were originally 2 sites right at the plant reporting. Those went away leaving only 1 in the DFW area.

### 1/5 — DO NOT BUY THIS APP!!!

*2015-09-17, version 1.2*

This app is useless! Doesn't show accurate live data at all! Total ripoff! >:(

### 1/5 — totally useless

*2015-06-23, version 1.2*

unlike other apps from black cat this one is worthless. hitting the green circle just shows a black screen. As another reviewer mentioned
there are only a few site. I would have expected at the minimum around nuclear plants.

### 5/5 — Best Application

*2015-06-21, version 1.2*

if can display the graph, black screen is shown up by tapping the circle.
Is there any setting needed to display the graph?

### 5/5 — Rad Map

*2014-11-21, version 1.2*

I agree with other ratings that this is the best radiation map on the web. Dirt cheap too.

### 5/5 — App is RAD!

*2014-10-13*

Everyone should have this.

### 1/5 — Not enough info

*2014-04-13*

I was hoping this map would be something like the Safecast. It is not. The lack of information about the equipment used to produce the measurements also makes the data set suspect. They really should have used uSv/hr or equivalent. I do regret purchasing this app.

## Frequently asked questions about Radiation Map Tracker displays worldwide radiation

### What does Radiation Map Tracker do?

Radiation Map Tracker displays worldwide ionizing radiation levels in real-time. It connects to a network of volunteer-run sensors to show current readings on an interactive world map. You can zoom in on specific locations to see detailed data and historical trends.

### How are the radiation readings obtained?

The app utilizes a network of constantly updating, real-time nuclear radiation detectors operated by volunteers. These readings are displayed in uR/hr, a standard unit for measuring radiation.

### Is this app free to use?

Based on the provided information, this application is a paid app. Purchasing a copy grants access to its features for monitoring radiation levels.

### Can I see past radiation readings?

Yes, tapping on a radiation reading on the map will bring up a chart displaying the last few days' worth of readings. You can also adjust the number of samples averaged to smooth out variations and observe subtle changes over time.

### What are typical background radiation levels?

Typical background radiation levels near sea level are generally between 10 to 20 uR/hr. Higher readings can naturally occur at higher elevations due to cosmic rays from outer space.

## Version history (last 4 releases)

### 1.3 — 2017-07-02

This app has been updated by Apple to display the Apple Watch app icon.

Updates for iOS 10
64 Bit

### 1.2 — 2014-07-01

Adds graphing of radiation readings.
Updates for iOS 7.

### 1.1 — 2011-03-30

New map display which allows better zooming and rotation.

### 1.0.0 — 2011-03-25

No release notes.

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All apps by Black Cat Systems: https://appshunter.io/developer/301047032

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*