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Best Day Calculator Apps

229+ iOS apps curated and reviewed

4.5 avg rating
20 free apps
Updated July 2026

From beginner-friendly picks to power-user tools, our day calculator list covers 229+ iPhone apps updated through July 2026. Compare ratings, prices, and screenshots in one place.

Compare top Day Calculator Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Date and Time CalculatorDate and Time CalculatorFree4.7★ (9.1K)YesNoJul 2026
2DayCountDayCountFree4.7★ (26K)NoYesJul 2026
3Days + Date + Time CalculatorDays + Date + Time CalculatorFree4.7★ (795)YesNoJul 2026
4CountdownCountdownFree4.8★ (179K)YesYesJul 2026
5The Date Calculator PROThe Date Calculator PROFree4.7★ (2.5K)YesYesJul 2026
6Date Calculator, Days CalcDate Calculator, Days CalcFree4.5★ (130)YesYesJul 2026
7Time Calculator - Work HoursTime Calculator - Work HoursFree4.7★ (2.7K)NoYesJul 2026
8Day CalculatorDay CalculatorFree——NoMay 2026

Top Picks for Day Calculator

Date and Time Calculator#1

Date and Time Calculator by 山 钟

Editor's Choice
🔧 Utilities
4.7😐(9.1K 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
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

Room to Improve

  • 🔒 Requires sign-in/account to use full features
  • 💰 Paid subscription for advanced features
  • 🐛 Bugs and glitches after updates
Days + Date + Time Calculator#3

Days + Date + Time Calculator by 山 钟

Days Between Two Dates
Worth Considering
📊 Productivity
4.7😊(795 ratings)
FreeAds
Days + Date + Time Calculator screenshot 1
Days + Date + Time Calculator screenshot 2
Days + Date + Time Calculator screenshot 3

Calculate the duration between two dates and times. This tool helps you find the exact number of days, hours, and minutes between any two points in time.

What We Love

  • 👍 Excellent app
  • 👍 Helpful and useful
  • 👍 Great variety of fonts and symbols
  • 👍 Easy to use

Room to Improve

  • 🐛 Excessive advertising
  • 🐛 Compatibility issues with updates
  • 🔋 High battery consumption

More Day Calculator apps to explore

4
Countdown
Countdown
Countdown
Day Counter: Timer & Widget
Free

Easily track important dates and events with a customizable countdown timer. Set reminders, organize events with tags, and view upcoming dates on your home screen or Apple Watch. Syncs across devices and offers various counting options.

Customizable countdown timerEvent remindersHome screen widgets
🔧 Utilities
(179K)
free with in-app purchases
5
The Date Calculator PRO
The Date Calculator PRO
The Date Calculator PRO
Calculate days between dates
Free

Easily calculate the duration between two dates, with or without accounting for the time of day. You can also add or subtract various time units from a specific date. The results are automatically converted into multiple units for your convenience.

Calculate duration between two datesInclude time of day in calculationsAdd/subtract years, months, weeks, days
🔧 Utilities
(2.5K)
free with in-app purchases
6
Date Calculator, Days Calc
Date Calculator, Days Calc
Date Calculator, Days Calc
Time: Add, Between, Difference
Free

Easily solve date math problems with multiple calculation options. This intuitive app helps you find the difference between dates, add or subtract days, and calculate workdays. It's simple and user-friendly for all your date-related needs.

Days Between Two DatesAdd to/Subtract from a DateWorkdays Calculator
🔧 Utilities
(130)
free with in-app purchases
7
Time Calculator - Work Hours
Time Calculator - Work Hours
Time Calculator - Work Hours
Date, Calendar & Salary Clock
Free

This comprehensive toolkit helps manage time, dates, and schedules with various calculators. Track work hours, plan shifts, convert time formats, and calculate differences between dates. Ideal for professionals, freelancers, and everyday users needing precise time management.

Work time trackingShift schedulingDate difference calculation
🔧 Utilities
(2.7K)
freemium
8
Day Calculator
Day Calculator
Day Calculator
by Alejandro Barrientos
Free
🔧 Utilities
(0)
9
Number of Days Calculator
Number of Days Calculator
Number of Days Calculator
Calculate number of days, date
Free
🔧 Utilities
(0)
10
My Love - Relationship Counter
My Love - Relationship Counter
My Love - Relationship Counter
by Bjoern Bartels
Free

Track the duration of your relationship with your partner. It generates unique anniversaries based on days, months, and years together. Personalize the app with a photo and receive notifications for special dates.

Relationship duration trackingCustom anniversary generationPartner photo personalization
🌟 Lifestyle
(681K)
free with in-app purchases
11
Day Counter - cute countdown
Day Counter - cute countdown
Day Counter - cute countdown
Cute day tracker & reminder
Free

Track important dates with this cute day counter and reminder app. It helps you count down to events, count up days since a specific date, and receive reminders for birthdays and holidays. You can also use it to monitor expiration dates for food and other items.

Countdown to eventsCount up days sinceHoliday tracking
📊 Productivity
(1.5K)
free with in-app purchases
12
Calculator for iPad!
Calculator for iPad!
Calculator for iPad!
Basic & Scientific Calculator
Free

This app offers both basic and scientific calculation modes with over 30 scientific operations. It allows for customization of the app's appearance and includes features for note-taking, drawing, and viewing calculation history. It supports high accuracy calculations and nested parentheses.

Basic and scientific calculator modesOver 30 scientific operationsCustomizable appearance (iPad)
🔧 Utilities
(60K)
free
13
Countdown ‎
Countdown ‎
Countdown ‎
Countdown Widget & Timer
Free

Visually track upcoming events with customizable countdowns. Set timers for vacations, concerts, or anniversaries using your own photos, music, and phrases. Share your progress with friends and family.

iOS 16 Lock Screen WidgetsHome Screen WidgetsCustomizable Background Photos
🌟 Lifestyle
(11K)
free with in-app purchases
14
Hours Minutes Calculator Lite
Hours Minutes Calculator Lite
Hours Minutes Calculator Lite
by Quackstro
Free

Easily calculate the difference between two times or add/subtract durations. This utility app helps manage time calculations for various purposes.

Add time durationsSubtract time durationsCalculate time differences
🔧 Utilities
(2.9K)
ad-supported
15
Day Calculator Elite
Day Calculator Elite
Day Calculator Elite
by Chuk Fong Ng
Free
🔧 Utilities
(0)
16
ClevCalc - Calculator
ClevCalc - Calculator
ClevCalc - Calculator
All-In-One Calculator
Free

This comprehensive calculator app offers a wide range of tools for everyday calculations, from basic arithmetic and scientific functions to unit and currency conversions. It includes specialized calculators for loans, health, fuel costs, GPA, and more, all within a clean and user-friendly interface.

Scientific calculatorUnit converterCurrency converter
📊 Productivity
(12K)
free with in-app purchases
17
DayCalc - Note Calculator
DayCalc - Note Calculator
DayCalc - Note Calculator
Calculator & Unit Converter
Free

This app combines a powerful calculator with a comprehensive unit converter. It offers standard, scientific, and fraction calculations, along with over 600 units across 20 categories. Users can customize units, add notes to calculations, and enjoy a visually appealing interface with multiple themes.

Standard, scientific, and fraction calculatorLive voice calculatorAdd notes to calculations
🔧 Utilities
(124)
free with in-app purchases
18
Date Calendar Calculator
Date Calendar Calculator
Date Calendar Calculator
Calculate Calendar Date & Time
Free

This app helps you calculate date and time durations, add or subtract time from dates, and determine working days. It also converts between calendars and time zones, and estimates ovulation and pregnancy due dates. The design is simple and intuitive.

Calculate date and time durationsAdd/subtract time from datesCalculate working days
🔧 Utilities
(29)
free with in-app purchases
19
Loan,Mortgage ,Tip Calculator
Loan,Mortgage ,Tip Calculator
Loan,Mortgage ,Tip Calculator
Discount, tax, and more
Free

This app offers a suite of six essential calculators for everyday financial tasks. It includes a powerful discount and sales tax calculator, along with five additional tools to simplify common calculations.

Discount calculatorSales tax calculatorLoan calculator
📊 Productivity
(502)
free with in-app purchases
20
Time & Date Calculator
Time & Date Calculator
Time & Date Calculator
Perform calculations with time
Free

Calculate exact durations between times, including seconds, and account for time zone differences and DST. View results in various units and share them easily. Supports a wide year range.

Calculate time duration to the secondCross time zone calculations with DSTView results in alternative time units
🔧 Utilities
(66)
free with in-app purchases

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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 July 2026, with a 4.7-star average from 9.1K App Store ratings, and it's free to download.
Yes — 20 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 July 2026.
We track 229+ day calculator apps on the iOS App Store as of July 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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