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Best Day Calculator Apps

249+ iOS apps curated and reviewed

4.3 avg rating
18 free apps
Updated September 2026

From beginner-friendly picks to power-user tools, our day calculator list covers 249+ iPhone apps updated through September 2026. Compare ratings, prices, and screenshots in one place.

Compare top Day Calculator Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Date and Time CalculatorDate and Time CalculatorFree4.7★ (9.7K)YesNoSep 2026
2DayCountDayCountFree4.7★ (26K)NoYesSep 2026
3Number of Days CalculatorNumber of Days CalculatorFree—YesNoMay 2026
4Days + Date + Time CalculatorDays + Date + Time CalculatorFree4.7★ (862)YesNoSep 2026
5Date Calculator, Days CalcDate Calculator, Days CalcFree4.5★ (131)NoYesSep 2026
6Day Calculator EliteDay Calculator EliteFree—NoNoMay 2026
7The Date Calculator PROThe Date Calculator PROFree4.7★ (2.6K)YesYesSep 2026
8KARL Business Day CalculatorKARL Business Day CalculatorFree—NoNoMay 2026

Top Picks for Day Calculator

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
DayCount#2

DayCount by Zaminiti Pty Ltd

Countdown Days Until Or Since
Strong Contender
📊 Productivity
4.7😊(26K ratings)
FreeIn-App Purchases
DayCount screenshot 1
DayCount screenshot 2
DayCount screenshot 3
DayCount screenshot 4
DayCount screenshot 5
DayCount screenshot 6

Track time towards future events or since past milestones. Set custom reminders, build positive habits with streak tracking, and visualize your progress with customizable widgets. Stay organized and focused on what matters most.

What We Love

  • 👍 Intuitive and easy to use
  • 🚀 Clean and fast app
  • 💡 Customizable backgrounds and themes
  • 🎨 Beautiful and visually appealing design
  • 🕰️ Accurate countdown tracking

Room to Improve

  • 🔒 Requires sign-in/account to use full features
  • 💰 Paid subscription for advanced features
  • 🐛 Bugs and glitches after updates
  • 🔄 Lost data/events after updates
  • 📊 Limited functionality in free version

More Day Calculator apps to explore

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FAQ about Day Calculator

What are the best day calculator apps for iPhone?
Date and Time Calculator tops our day calculator apps ranking as of September 2026, with a 4.7-star average from 9.7K App Store ratings, and it's free to download.
Yes — 18 of the top day calculator apps we rank are free to download, including Date and Time Calculator and DayCount.
Date and Time Calculator shows ads and has no in-app purchases, according to its App Store listing as of September 2026.
We track 249+ day calculator apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
This application allows you to calculate the precise duration between any two given dates, down to the second. It can also determine future or past dates based on a specified period.
Key features include calculating the exact time distance between any two points in time, down to the second. It also offers functionality to find the date before or after a certain period, useful for planning and tracking.

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