"Remote Flash Trigger" is an innovative Android app that enables users to control their phone's flashlight remotely via HTTP requests. By listening on a user-defined port, the app accepts commands to turn the flashlight on or off through simple URL requests, such as 'http://phoneIP:port/on' for activating and 'http://phoneIP:port/off' for deactivating the flashlight. This makes it an ideal tool for various remote lighting needs.