AppShaker will enable to quickly launch their favorite screenshot app with a shake whenever they come across something they want to take a snap of, without having to go back and forth between it and the homescreen/app drawer.AppShaker runs as a background service that monitors feedback from the accelerometer in your device. Give your device a good enough shake and AppShaker will launch the selected app. You can disable said background service from MEnu > Settings > Enable AppShaker.To reduce the required “shake strength”, increase the Shake sensitivity from the Settings screen (Menu > Settings).

via addictivetips.com