When comparing UpTo vs Rooster calendar, the Slant community recommends UpTo for most people. In the question“What are the best calendar apps for iPhone?” UpTo is ranked 20th while Rooster calendar is ranked 21st.
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Pros
Pro Advanced shared calendars system
Pro Schedules for TV shows and music releases
Pro Combined Calendar and To-Do List
It lays out your tasks and events each day, making it easy to stay on top of things. It has a pin board for tasks that are important, 'someday' or just dont belong to dates.
Pro Beautiful UI
UI is awesome, better than the standard calendar app which is a bit bland, and has far too many layers. Rooster keeps things simple with it's single view design, making it easy to see everything you need to do at once.
Pro Summary View
Rooster gives you the option to just see your 'daily headlines', which is a handy summary of your days. It's great for when you're busy and just want to see what's coming up.
Pro Quick and easy to add appointments
Rooster makes staying organized on mobile easy. It has it's QuickCal keyboard that lets you enter your appointments in just a few taps.