I have tried both the Toodledo iphone app and the Appigo Todo iphone app. The one thing that keeps me from using the Toodledo iphone app as my main organizer is the fact that I cannot sort my lists in multiple ways. For instance, in Appigo Todo I can pick a folder, sort the list by due date and priority and then further filter the list to show a certain context and also a certain tag.
With the Toodledo iphone app, I can't get that multiple "breakdown" affect. Are you guys going to be offering multiple ways of filtering lists anytime soon?