Ranked in these QuestionsQuestion Ranking
Pro Nearby and context-sensitive tasks
OmniFocus 2 allows you to set up contexts for tasks in certain areas. This makes sure you never miss a task when you're out running errands or happen to be near something you need to do. Just set contexts around places you frequent or set as a specific task.
Pro Forecast summary
The Forecast Summary shows a quick glance of the tasks you have that day. You can tap on any day to quickly see what tasks you have planned that day. For extra functionality you can connect the iPhones Calender app, which allows you to also see any other events you have planned that day.
Pro Organize tasks into projects
OmniFocus 2 allows you to organize tasks into Projects, allowing you to keep your tasks organized in the best way to stay efficient for that project. Each task also features summary dots. For example, red means the task is overdue and orange means its due soon. There is also a range of other dots that can be specific to projects.
Pro See an overall view of tasks via "Perspective"
The Perspective section allows you to see an overall view of the tasks you have set. It also allows you to set contexts or see things you have flagged.
Pro Superbly customisable via Perspectives
Pro Excellent full stack support from phone, to tablet, to Mac
With very good synchronisation.
Pro Picks up reminders added via Siri
Pro Best support for GTD in the marketplace
This really supports the implementation of David Allen's Getting Things Done
Pro Client side encryption
Pro Apple Watch integration
You can send lists from your iPhone, and get notifications on your watch each morning with any tasks you have set for that day.
Con Very expensive
$40 for a to-do-list app is a bit much, even with all the other features it offers.