Try this – ActionAgenda - Calendar & GTD Planner (+Toodledo) Review

I have used too many different calendar, task manager and planner apps and found them either lacking or unstable. This is truly a Comprehensive app with shockingly rapid and useful response from support. Very easy to use with drag and drop conversion between tasks and events. Both tasks and events are shown on the same calendar. Syncs nicely with iOS calendar and Toodledo.
Review by jwl126 on ActionAgenda - Calendar & GTD Planner (+Toodledo).