Great, useful

This app gives me about a 4 second heads up on quakes. I live in the Tokyo area. It uses your location to notify you of quakes and at what level you will feel them. Because of this I am not sure some one outside of Japan would be notified. It was notifying me late, earlier in the week, but now gives me notice in advance. Neat.

hooktrunk about PREP（プレップ） - 総合防災アプリ