Now that I am forced to use a Windows OS at my new work, I was compelled to find a windows counterpart for my current GTD app - 2Do. Good thing I came across with Everdo app because they are very similar. Similar with any To Do app, 2Do has all the basic features (and more), the ‘clean’ interface plus the ‘sync’ feature across devices using cloud. The only caveat with 2Do is that there is no Windows version.
With work now, I choose Everdo because it feels more familiar. I love the minimalist interface. The notebook feature as well. However, a Calendar, Smart Search and a Mobile Sync feature would be a great addition to Everdo app.