A free program for Android, by Notepad.
Safe Notes is a highly accessible, password-protected notepad that's safe and fast, easy to use, and ad-free. It can be used by anyone looking for a simple note-taking app with just the right features they need. Use Safe Notes to store passwords, credit card numbers, account numbers, and other sensitive information that you want to keep private. Safe Notes keeps your data safe and secure whether you're at home or on the go. Because Safe Notes syncs with the cloud and is available through a web browser or the Android app, you will always have access to your data when needed.
