I love Any.Do on the android but I had syncing issues with Google Tasks which I like to use as I like to see tasks on my calendar. Other than that though it’s a fantastic app and if it had the same ability to display on the Calendar as Google Tasks I’d definitely make it my go to task manager. As it is I’m using Team Tasks android which has very tight syncing. Not quite as slick as Any.Do but still looks great and works pretty well.