Flashlight - Flash alert on call & SMS, flash notifications for any apps The flashing lights light up to signal when you have an incoming call, messages & app notifications. Strobe light - Flash Alert is a smart Flash app: Flash notifications to alert you when you receive a phone call, text message, or any other social network notification with the strobe light. Imagine you are at a loud music party or at night where you can't hear the ringtone and don't feel the vibrate. Flash App: LED light