If your Smartphone is not sleeping deep during standby, it will drain your battery a lot. Some devices, for example Samsung Galaxy Note, don't get into Deep Sleep state from time to time. With this small app and widget you keep up-to-date about your devices Deep Sleep status.
If you notice, that your Device seems to don't get into Deep Sleep any longer, you should shut down your device and re-boot it. In most cases, Deep Sleep works again well then... until the next time...
Deep Sleep is calculated in percent since the last system boot. A trend indicator shows, if the Deep Sleep percentage is increasing or decreasing.
Widget is auto-updated every 30 minutes.