When comparing Casual vs Omnifocus, the Slant community recommends Omnifocus for most people. In the question“What are the best cross-platform task apps?” Omnifocus is ranked 63rd while Casual is ranked 67th. The most important reason people chose Omnifocus is:
Omnifocus allows users to setup the "defer date" which can be treated as "start date". Tasks will not be marked as available until that date, which should help to focus on the "available" task only.
Specs
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Pros
Pro Tracks task dependencies using a graph
Pro Great to-do templates
Every to-do list & project can be saved as an amazing template that you can re-use in the future.
Pro Offers a high-level overview of projects
The workflow with dependencies shows where the things are at a glance. No more frustrations of how your project is going and who is doing what.
Pro Sync deadlines to Google Calendar
To-do items can be integrated with your day-to-day schedule using Google Calendar.
Pro Visual way of organizing your work
The workflow includes dependencies and shows you where things are at a glance.
Pro Defer date
Omnifocus allows users to setup the "defer date" which can be treated as "start date". Tasks will not be marked as available until that date, which should help to focus on the "available" task only.
Pro Forecast summary
The forecast summary shows a quick digest of the tasks you have for the day. You can select any day to quickly see what tasks you have planned that day. For extra functionality you can connect with the iPhone’s Calender app, which allows you to also see any other events you have planned that day.
Pro See an overview of all tasks via "Perspective"
The Perspective section allows you to see an overview of the tasks you have set. It also allows you to set contexts or see things you have flagged.
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 and happen to be near something you need to do.
Cons
Con Price
At its cheapest level, Casual is $9 per month for two users and two GB of storage. The trial period is short and there is no free version.
Con Mac and iOS only
Omnifocus doesn’t work on non-Apple platforms.