Looks great but 50/50 chance of not working.
Downloaded this app on my MacBook Pro, my iPad and iPhone. I tried the free version before spending money on the professional one. Tried setting up tasks, sub tasks and uploading some attachments. Once created I could not open the tasks to look at the sub tasks on my computer. I would open on the iPad and iPhone, but it would not show the attachments, even after syncing. When opening a task on my computer there was a 50/50 chance the task would be marked completed, even though I just wanted to open it to work on sub tasks. The app looks beautiful and should work easily, however that was not the case for me and within an hour of installing and testing, now deleted from all devices and continuing the use of reminders and notes.
MeetingProf about
Any.do - To do list & Calendar