I initially had CollaNote, KiloNote, Notability and GoodNotes all on my little iPhone 8. Out of all of them, I think Goodnotes is the best one. However, I think KiloNote is a close competitor. I can really see myself using KiloNote, if I just wanted a digital journal.... but I think GoodNotes has that magnifying tool, and that has won me over. KiloNote does seem to have the magnifying tool as well, but it seems to be on iPad/tablet? Anyway, with just my iPhone, I can't seem to find the magnifying tool, and when I zoom up the page, the page doesn't zoom big enough, making it hard to hand-write.

I don't do subscription plans and all that, so I just get the one-time-payment option. Now, with the full version of Goodnotes, I have unleashed the awesomeness.

I can annotate on PDF files and image files.

I can create a journal/diary/notebook/planner.

I think I make a good GoodNotes testimonial person. (lol)

I also want to add that I tend to use Goodnotes app on my iPhone, and for my stylus, I just use my finger. It does the job real good.