With Just Notes you can create simple notes or To-do lists, add a widget on the home screen showing a selected note, do backups of data automatically and a lot of more stuff.
There are a lot of apps on Android that allow you to create and manage notes, and everyone grants to user almost similar functionality: the difference is in the way they allow you to do them.
Just Notes, with its intuitive User Interface, tries to grant the best User Experience possible.
Classic notes with the possibility to add modifiers such as bold, italic, bulleted lists, numbered lists and even more.
Checklist with reorderable elements.
You can add widgets on your home showing notes you need to check more steadily.
You can setup an automatic backup on your device to not risk of losing data.