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Best Calendar Calculator Free Apps

249+ iOS apps curated and reviewed

4.4 avg rating
20 free apps
Updated October 2026

Looking for free calendar calculator free apps? 20 of our 249+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Compare top Calendar Calculator Free Apps (October 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Date and Time CalculatorDate and Time CalculatorFree4.7★ (9.7K)YesNoOct 2026
2Date Calendar CalculatorDate Calendar CalculatorFree4.9★ (29)YesYesAug 2026
3CalendarCalendarFree4.9★ (1.5M)NoNoOct 2026
4Calendar Calculator FreeCalendar Calculator FreeFree1.0★ (1)NoNoMay 2026
5The Date Calculator PROThe Date Calculator PROFree4.7★ (2.6K)YesYesOct 2026
6DayFinder - Date CalculatorDayFinder - Date CalculatorFree—YesNoMay 2026
7Time Calculator - Work HoursTime Calculator - Work HoursFree4.7★ (2.9K)NoYesOct 2026
8Number of Days CalculatorNumber of Days CalculatorFree—YesNoMay 2026

Top Picks for Calendar Calculator Free

Date and Time Calculator#1

Date and Time Calculator by 山 钟

Editor's Choice
🔧 Utilities
4.7😐(9.7K ratings)
FreeAds
Date and Time Calculator screenshot 1
Date and Time Calculator screenshot 2
Date and Time Calculator screenshot 3

Calculate the exact number of days, hours, and seconds between any two dates. This tool also allows you to find the date before or after a specified period, making it useful for tracking deadlines, events, or financial products.

What We Love

  • 💡 Helpful for tracking dates and time
  • 👍 Simple and easy to use
  • 🚀 Accurate calculations
  • 🚀 Useful for various purposes (medication management, work timelines, etc.)

Room to Improve

  • 🐛 Ads are intrusive and difficult to close
  • 🐛 Compatibility issues on iPad
  • 🐛 Bugs with date/time calculations
  • 🐛 Language issues with ads
Calendar#3

Calendar by Apple

Worth Considering
📊 Productivity
4.9😐(1.5M ratings)
Free
Calendar screenshot 1
Calendar screenshot 2
Calendar screenshot 3

Organize your entire schedule in one place. View events from multiple accounts, manage tasks, and plan gatherings with others. Stay on top of appointments, holidays, and birthdays with customizable views and shared calendars.

What We Love

  • 🚀 Essential app for staying organized
  • 👍 Clean, intuitive, and easy to navigate
  • 🔒 Seamless sync across devices
  • 👍 Helpful integration with other apps
  • 👍 Ability to set multiple alerts, share events, and color-code calendars

Room to Improve

  • 🐛 Autofill suggestions overwrite event time
  • 🔍 Search function not reliable
  • 🔍 Inability to delete past/declined events
  • 🔍 Confusing interface, cluttered month view
  • 🔍 Lack of customization options for alerts and reminders

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FAQ about Calendar Calculator Free

What are the best calendar calculator free apps for iPhone?
Date and Time Calculator tops our calendar calculator free apps ranking as of October 2026, with a 4.7-star average from 9.7K App Store ratings, and it's free to download.
Date and Time Calculator shows ads and has no in-app purchases, according to its App Store listing as of October 2026.
We track 249+ calendar calculator free apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.