"I'm Sleeping" is an Android application developed by lalain that automatically sets your phone to silent mode during the night. It is a useful utility tool that ensures you won't be disturbed by notifications or unwanted phone calls while you're sleeping.

The app has several features that make it easy to use and customize according to your preferences. It has a white list option that enables you to select a group of people from your contacts who can bypass the sleep mode. You can choose to allow favorites, all, none, or a specific group. Additionally, the call-through feature allows anyone calling repeatedly to reach you.

The app also has a nap mode option that allows you to manually set for how long you plan to sleep. You can also set a different schedule for weekends using the weekend mode feature. Furthermore, you can disable the LED during the night if you wish.

Overall, "I'm Sleeping" is a fast and easy-to-use app that ensures you can sleep happily without anyone disturbing you. Note that some devices may throttle the app to save battery, which is beyond the developer's control.