What's your favorite to-do app?

A native iPhone app is a must, bonus points for Mac and iPad apps. I have already considered Things, OmniFocus, and Reminders.

@aleen I've been using Obsidian but it's not ideal unless you're already deep in Obsidian's system, if I wasn't I really like NotePlan and would likely use that.

I also just discovered Godspeed on SetApp which also looks interesting.