QuickPic has been my go-to gallery app on Android for a long time because it's fast and easy to use. A recent update made it even better, with Material Design animations and integrated cloud storage backup. If you're not a fan of Google's Photos app, which integrates Google+ with all of the images on your device, and just want something better to use, QuickPic is where it's at. QuickPic is free and available now.