A free app for Android, by NEAP.JP.
When you get a notification, you usually need to swipe to view it. But with this app, you can just tap the icon, and it will open the status bar.
If you want to make a note, just press the back button. If you want to close the status bar, please tap the button on the top right.
If you want to make a note with a deadline, just click the button on the top left. It will ask you for a title and then a comment.
You can also add tags. If you have a tag, it will be displayed on the status bar.
This app can be used to make a to-do list. It can be seen on the status bar.