The Reminders app in iOS is not bad. This synchronizes with Reminders so youre not giving anything up. Any.do suits me a bit better than Reminders. Even took the place of my paper notebooks in Superfocus style which were already very effective. Too bad all the Kiip rewards are unrewarding to me and I didnt find a way (in free version) to turn them off. Still, theyre no worse than any other kind of ads. They are easy to ignore, if you prefer.