Day One is a journaling app that allows users to create their own personal "secret diary" in which to add text, images, videos, recordings, and much more. The app design is very simple and user-friendly, allowing you to find (and find again) your old writings easily. Furthermore, thanks to the "memories" function, you can always go back and reread what you previously chose to save, thus always keeping any specific memory alive. Also, thanks to end-to-end encryption and access with biometric data, you can always be sure that no one will read your diary... not even on your mobile!