MRU (Most Recently Used)

• Blacklist allows you to exclude any applications you don't want showing up in the widget.

• Customizable grid dimensions

• Choose a grid sorting order that best suits your needs

• 'Most recently used' and 'Most used' modes

• Icon pack support

• Per application icon selection

• Lots more styling options that allow you to create a widget which perfectly fits your home screen's theme

• Marshmallow users should disable battery optimizations in system settings for a better experience

• To hide Google App from widget blacklist 'Voice Search'

• A must have little app

• Out performs all others

http://forum.xda-developers.com/android/apps-games/app-mru-widget-recently-v0-3-t3137565