This APP allows you to detect the lack and consequent resumption of electricity supply. In case of absence, the APP sends an e-mail to the stored address: a delay time can be selected for sending at the discretion of the user. In the case of shooting, however, the FREE Power Monitor version sends an email after at least 30 minutes and the PRO version, even instantly. This email is sent by Power Monitor, using its own outgoing mail server, therefore no special configurations are necessary. This is a 1.0 version, so any suggestions are welcome! Android required since version 5.0 (Lollipop)