Renotify is one of the fastest note-takers I have come across. It allows you to take notes very quickly, no further clicks or taps, no labelling, no choosing icons. Just tap the app icon, type in your note and save. That’s it. In fact, by the time you read this sentence, you could have created a note!
The focus of this app is on speed. Hence the bells and whistles of a typically serious app are absent. Just put the app on your home screen or lock screen, and all you have to do is open it, immediately type your message and press a button, and your reminder will be waiting for you in the form of a notification next time you look at your phone. The paid version has editing options too, but the free version is just enough for starters.
So have you taken your first note / reminder yet?