"JR East application" is the application that provides the deals convenient to customers having you use it and train-station, store of JR East.
● It is a quiz application on the railway station in Japan. If you answer the quiz you will be able to train station communication.
"Hayagaeri" Train Traffic information is an app that can be referenced in real-time operating information about the railway.
EX-ALARM (EX alarm), when you use the Tokaido Shinkansen, you can use fun conveniently. [Japanese only]