FlashOnCall (old ver. ) is an app with flexible settings that uses flash on your smart phone's camera to notify you about various events, such as messages and incoming calls. Features: 1. Flash on incoming calls. 1. 1 Customisable flash duration. 1. 2 Customisable flash frequency. 2. Flash on text messages. 2. 1 Customisable number of flashes. 3. Common settings.