Extreme Calendar
A configurable calendar interface built on native calendar data, with multiple views, repeating events and optional organizer upgrades.
Consider for users whose existing calendar service already works
Inline event entry, templates and display filters offer alternatives to the system calendar presentation.
Keep in mind: The developer says more resources are going to the newer Ulti-Planner app. Do not assume that app or every organizer feature is included here.
Inside the app
Official product images
What you can do
- Switch year, month, week, day or agenda views
- Create advanced repeating events
- Move or copy events and use templates
- Filter calendars and customize display
Good for
- Users wanting another view onto configured iOS calendars.
Consider alternatives for
- People expecting a new calendar-hosting service or guaranteed future feature parity with the promoted successor.
Limitations & considerations
- Captured minimum: iOS 12.0.
- The developer says more resources are going to the newer Ulti-Planner app. Do not assume that app or every organizer feature is included here.
Privacy & permissions
Calendar and optional contact access can expose meetings and personal relationships. Sync remains subject to the underlying configured service.
Sources & review notes Updated Nov 11, 2026
Reviewed by iApp4Me Editorial Team. Recommendations use the linked documentation and attributed accounts; device observations are identified separately.
- US App Store developer description
Complete description, download price and compatibility metadata captured 2026-11-02.
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