Compatible with iOS 7, 8, 9 on all devices.
ChargingDone will notify you when your device is fully charged (100% in the status bar). You can be alerted by a popup or a banner.
A sound and a vibration can go with the alert. You will be reminded 2 times if you forgot to unplug your device :)
See the screenshots to see how ChargingDone looks
This tweak was requested by /u/Sally_JB here
Note: Some information about Li-ion batteries.
Configure options from settings
Enjoy!