When comparing Casual vs Wekan, the Slant community recommends Wekan for most people. In the question“What are the best cross-platform task apps?” Wekan is ranked 60th while Casual is ranked 67th. The most important reason people chose Wekan is:
Open source software benefits from collaborative development from the user community.
Specs
Ranked in these QuestionsQuestion Ranking
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 Open source
Open source software benefits from collaborative development from the user community.
Pro Install with a few clicks with Cloudron or Yunohost
Making it really easy to self host.
Pro Easy to create instance on sandstorm.io
Wekan is available as an app on sandstorm.io. For personal use, it may be sufficient to run an instance in a free sandstorm account.
Pro Easy to install on most arm64, x86 and x64 linux systems
Pro Friendly support
Developers are very helpful and friendly.
Pro Clear UI/UX
Well-thought-out user interface – despite the high complexity of the functionality very intuitive.
Pro Can easily be integrated with NodeJS apps
Since it's built using Meteor, it can easily be integrated with existing NodeJS apps.
Pro Written in JavaScript
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 No print version of the ticket page
Con No desktop notifications
