A unique feature to the Moto X was its camera launching gesture that allowed a user to twist their wrist twice to quickly open up the camera application. The gesture saved a bit of time and shortcut space, so it's easy to see why it was well-received on the X.
XDA user ssrij decided that the Moto X camera gesture was cool enough that there would be demand for it on other devices, so after weeks of tweaking and experimenting, he's released an alpha version of QuickCamera on the Play Store that mimics Motorola's intuitive gesture.
The app is pretty simple; you start the service, then it sits in the background and will open your camera application if you twist your phone twice in quick succession. It uses the accelerometer in phones to register the gesture, and since that's standard hardware in nearly all Android devices, it makes the app widely compatible. It also requires Android 4.0 and up, but like the accelerometer, it's tough to find a device without it these days.
The app is still in its alpha stage, so it might be a little buggy and will probably be more battery-unfriendly than the finished version will be. However, if you're interested, you can sign up for the Google+ beta page at the link below then download the application from the Play Store to give it a spin.
source: QuickCamera Beta Community
