Pocket Informant PremiumFantasticalCalendars 5 Week CalOmniFocus
One purchase for both iPad and iPhone✔️✔️
Weather Integration (in-app purchase)✔️✔️ (weather calendar subscription)
Show Events and Tasks in one screen✔️✔️✔️✔️ (In forecast mode only)
Checklists for Tasks✔️
Natural Language Parsing for Events/Tasks (speak or type naturally to create item)✔️✔️✔️
Separate Notes Feature✔️
Rich Text Notes✔️
Calendar Filtering✔️✔️✔️ ✔️ ✔️
User-Defined Smart Filters for Tasks✔️
Templates for frequently-occuring Events and Tasks✔️✔️
Location-based Alerts✔️✔️✔️
Works with Apple Calendar and Reminders✔️✔️✔️✔️✔️
Syncs with Google✔️✔️✔️✔️
Syncs with Toodledo✔️
Airdrop of Events, Tasks, Notes✔️✔️ (Events)
Calendar Printing✔️
ETA for next scheduled Event✔️✔️
Desktop App✔️✔️✔️