RadMap - Radiation Map
Live ambient radiation map
Free
Live ambient radiation readings, on one map.
RadMap gathers open data from Korea's national monitoring network (IERNet, operated by KINS), Japan's national network (RAMIS, operated by the Nuclear Regulation Authority), France's Téléray network (operated by ASNR, the French nuclear safety and radiation protection authority), and the Safecast citizen sensor network, and shows the current ambient gamma dose rate.
WHAT YOU CAN SEE
- Live readings from roughly 490 official Korean monitoring posts
- Japan's official network across all 47 prefectures, plus the dense grid around nuclear facilities
- France's official Téléray network: about 450 stations across mainland France, its overseas territories and around nuclear sites, updated every 15 minutes
- Safecast citizen sensors worldwide
- Map, list and per-station detail, with the trend over time
BUILT SO THE NUMBERS CAN BE READ
- Every dose band carries a text label such as "Normal" or "Slightly high" alongside its colour. Colour is never the only signal.
- Readings are compared to familiar amounts: one X-ray, one flight, a year of natural background.
- Where many stations overlap, they are grouped and shown as an average dose.
- All figures use tabular figures, so the layout never shifts as a value changes.
WHAT THIS APP PROMISES
- The summary at the top of the screen covers Korea. It is calculated from the live readings of official Korean stations, never a pre-written sentence. If any of them rises above its normal band, it becomes an alert.
- Every reading carries a provenance badge. Government networks and citizen sensors are never blended together.
- Citizen sensors are not cross-calibrated, so they are never used to judge the picture across Korea.
- No ads are shown while any official station is above its normal band.
PLEASE NOTE
This is an unofficial app that presents publicly available data in a readable form. Do not rely on it for official announcements or emergency decisions; for official information, please consult the relevant regulator.
Available in Korean, English, Japanese and French.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Updated to the latest Flutter and libraries for better stability and performance.
The developer, Byung Kwon Jeon, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Byung Kwon Jeon
- Size
- 25.3 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later.
- iPhone
- Languages
English and 3 more
- English, French, Japanese, Korean
- Age Rating
4+
- 4+
- Contains
Advertising
- Copyright
- © 2026 The 42 Apps