The draft of e-mail can be created and saved beforehand.
standard mail -- in an application, if e-mail is transmitted, it will be deleted from a draft folder.
However, in this application, the draft is saved at iPhone and it can use any number of times, being able to call.
Moreover, your current location can be acquired and it can add to the e-mail text.
The motive to develop this application is the Great East Japan Earthquake which occurred in 2011/3/11.
Although I walked and returned from Shinagawa to Nerima on that day, the hot eye was carried out without being dark and also being able to use a mobile phone the trip of night.