When comparing Ultimate To-Do List vs Quire, the Slant community recommends Quire for most people. In the question“What are the best to-do list apps for Android?” Quire is ranked 25th while Ultimate To-Do List is ranked 39th.
Ranked in these QuestionsQuestion Ranking
Pro Syncs with Toodledo and/or Google tasks
After set-up, it will automatially sync with your Google Tasks or Toodledo accounts.
Pro Good, configurable widget
The widget is customizable and lets you edit or mark tasks as completed.
Pro Functionality rich
Pro Cross platform, sync and offline usage
Pro Organizations, projects, task, hierarchical subtask and smart folders
Unlimited tasks/todo structures
Pro Integration with calendar and github
I haven't dabbled with that though
Pro Multiuser handling
Handle multiple users and assignments
Pro It is free
As of now, at least.
Con Interface can get a bit noisy
With the amount of information the app presents it can get a bit difficult to easily overview tasks.