Try the free version:
https://play.google.com/store/apps/details?id=com.appdoodle.tools.capturescreenplus
before buying or ask for refund from Play Store within 15 minutes of purchase *

* Simplest way to capture your devices screen and share with friends.
* Developers can use it to take screen shots of their android applications.
* Easy to use interface.
* Option to save images in png or jpg formats.

NOTE: To remove superuser permission toast message from your screenshots, goto your "superuser permissions" app and disable toast messages.