2Do lets you take a completely different approach to managing your tasks. With its extremely simple-to-use interface and a comprehensive and flexible set of powerful features, it lets you focus on what's most important to you: your life. There is no wrong way of using 2Do, and unlike other to-do apps, it won't force you in adhering to a particular task management methodology.
App of the Year 2015 - Macstories
GTD®, XYZ and everything in between - it can handle it all. Seriously.
See and believe: Youtube.com/The2DoApp
For those concerned about the 14 day Full Feature Trial message in the settings, basically means you will loose the following features: Sync, Backups and Alerts after 14 days.
junk!!!full featured trial ends in 14days!