When comparing Amazing Marvin vs WeDo, the Slant community recommends WeDo for most people. In the question“What are the best cross-platform task apps?” WeDo is ranked 41st while Amazing Marvin is ranked 51st. The most important reason people chose WeDo is:
Has versions for Android, Web, and iOS.
Ranked in these QuestionsQuestion Ranking
Pros
Pro GTD
Pro Works excellently on Linux
With just clicking the right button of the mouse, entering properties and giving write and read permissions and clicking on the "Allow the file to run as a program" box is installed with total ease.
Pro Great support
Pro Active development
Pro Cross-platform
Has versions for Android, Web, and iOS.
Pro Supports file attachments
You can attach files to each task.
Pro Great user support
It is a new app, but they have a very good interface so the users can send their suggestions to improve the app.
Pro Users can add recurrent tasks
It allows users to set recurrent tasks.
Pro Supports subtasks
You can add subtasks to any task.
Pro Allows users to assign tasks to other users
It allows you to assign tasks to other person. If he/she does not use WeDo, it sends an invitation.
Pro Clean interface
Pro Free
At least for a while.
Pro Supports groups
You can add groups, and for each group, yuou can add members. It is something like Trello Boards, but I think its better.
Cons
Con Not free
Con No calendar integration
Does not have calendar integration