Little utility will add to incoming calls sms and a notification of applications such as Viber WatsApp Fasebook Vkontakte Instagram and others a bright flash with fine tuning.

The ability to separate operation
  Calls +
  + SMS
  + Applications

Time management:
  + Flash Time
  + Pause time between outbreaks

SMS
  + Manual selection of the amount of flash repetition

apps (is available for Android 4.3 or higher)
  + Manual selection of the amount of flash repetition