S by Firefox is a simple, secure notepad app that syncs with Firefox. It's the first Android Test Pilot experiment from Mozilla, the makers of Firefox. To use Notes, you'll need a Firefox Account, and the free Notes browser extension from Firefox Test Pilot. Simple. A simple notepad to create a to-do list, take a memo, or capture a brilliant idea.
It's free of charge to get the installation package of Notes by Firefox, also, you can take a look at users' reviews on Droid Informer. The app is completely secure for downloading. This application was originally designed by Mozilla and it is included in the Productivity category.