CameraMicAlert was created due to recent news articles saying how malware is spreading into the play store and activating the camera. It works by communicating with the core camera and mic interface built into Android to detect if the camera or mic is in use by malware or software. It will then alert you by updating an ongoing notification that is present in the notification menu. As well as update an activity log that is present in the app.
CameraMicAlert keeps all this information on your device and doesn’t share it with any external service.