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Japan Real-Time Quake Alert ++

0.99 usd

Japan Quake Alert is an English-based application that provides Japan earthquake information from official sources (Japan Meteorological Agency) as well as crowd-sourced information (first-hand user updates, etc.). Push notification function is also available, providing real-time information directly to your phone, sometimes within seconds of initial tremors! This is the donate version of the app that is AD-FREE, slightly smaller in size and will get updates earlier than the free version. Feel free to purchase this version if you think that this app is helpful and would like to support us.
1. Information is given predominantly in English. User reports from Japanese sources are translated where possible.
2. Push notification option, which provides a quick alert to your phone status bar when initial tremors are reported at the epicenter.
3. Fast (sometimes within seconds of first tremors). This is because information is not solely from JMA (which usually has a 5 mins delay), but also from social media and other firsthand sources around Japan. Frequency of update is 10 seconds.
4. Links to detailed information (intensity, magnitude, coordinates, etc.) and maps are provided and can be browsed within the app itself. These are mostly in English as well.
5. Simple, compact and fuss-free user interface.
-------------------------NOTE TO USER-------------------------
You may notice that several permissions are required. Internet and Network permissions are understandable as the information is real-time. The other permissions pertain primarily to the C2D messaging (a.k.a push notification) by Google. Note that the notification option can be turned OFF.
Where possible, translations have been made. This is an ongoing work so do expect a little Japanese slipping in here and there in the reports.
As some of the information are obtained from social media or user reports, accuracy of the reports may vary, particularly for very early warnings. For more certainty, you may wish to refer to JMA reports.
Feature requests are welcomed. Email us at
----------------SOURCES----------------Credit for the information goes to Japan Meteorological Agency,, p2pquake and various social media platforms.
-------------------KEYWORDS-------------------Earthquake, quake, tremors, warning system, alert, alarm, 地震, JMA, real-time, seismograph, seismic activity, P2P, crowd sourcing, Japan, 日本, richter, tsunami