The Moto X which is recently released by google has a inbuilt screenshot feature . There is no needed to install an app .
Follow this short two steps tutorial in your motorola Moto X Device to take a screenshot / screencapture
1. Press both the Power button and the volume down button together
2. The Screenshot is taken in a few seconds and it’s saved on your device folder Pictures >> Screenshots.
You can also share it via email or other using the share option.
Hope you enjoyed the tutorial. Do share and comment if you have any problem while taking a screenshot .