Supanote secret notes locker, enables you to:

-Write, edit and save you secret notes.
-Give and filter you notes with categories/tags.
-Also comes with a passwords manager to keep them organized.
-Define a password to lock the app.(can't access the app except if you enter the right predefined password).
-Backup your notes and passwords, (if you want to transfer your data from a device to another).

/!\Note: Please make sure to remember the password you defined to lock the app.

Any suggestions are welcome.