I just use Notes on my iPhone or Mac because it syncs between all my devices nicely.

If I’m using my phone to do long form posts I’ll use a Logitech keyboard to write as it’s easier to do than on the onscreen keyboard. But I have written a few long form posts using the onscreen keyboard.

I then copy and paste into Ecency, Actifit, or peakD depending on which platform I decide on the day… although I’m looking at using Actifit more now that my blog has changed to a more fitness oriented blog.