Take note with text, picture, to-do and voice. Hide private notes. Shake phone to record voice during a call.
Comparing this option to note-taking apps like EverNote, Onenote, Google Keep etc, they all are flawed. So sloooooow, always depend on your Internet connection. It's just horrible. However, MixNote is a great alternative! It is only 2.8MB. It's so much faster. Never crashes (at least when your operating system works normally).