Idle Apps on LG G2 shows you the list of Android unused apps installed on your device, in the given time period. In other words you can see which apps you barely use over time, and easily uninstall/remove unused apps to make some more free space (which is very useful since G2 doesn't support external memory)
To enable Idle Apps do as follows:
1. Open Settings and swipe to General tab
2. Tap Apps
3. Press "Menu Button" and then open "Idle Apps"
4. Use the toggle button on the top right to enable the feature, change the Idle time period and Notification interval
5. Tap "List of idle apps" to see which applications have not been used in the selected time interval
6. Hit the Uninstall button to remove those unused applications
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