Take simple text notes. You can put them into folders to create your own quick, easy and robust file structure.
CrocodileNote supports two modes - plain and encryption. In encryption mode all data is encrypted using password-based encryption (PKCS#5) with AES-256. These are common industry standards and used by, e.g., the famous TrueCrypt disk encryption.
In plain mode you can view and copy folders directly via PC from your internal SD card. Use encryption if you want to protect your data and your privacy!
CrocodileNote is an open-source project. We want to establish trust in our app. You can checkout the source code here: https://code.google.com/p/crocodilenote/.
There is also a compatible open-source Windows version of CrocodileNote (beta phase): https://github.com/Groomiac/CrocodileNote/releases
Further features: - Export to ZIP for backup - Linkify notes in case you store e-mail addresses, Internet addresses/URLs or phone numbers - Auto-logout switch for 30 minutes (encryption mode only)