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Best Date Calculator Apps

220+ iOS apps curated and reviewed

4.6 avg rating
18 free apps
Updated June 2026

The best date calculator apps on iPhone average 4.6★ across 220+ titles — we've ranked them by what real users actually keep on their phones. Updated June 2026.

Top Picks for Date 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
My Love - Relationship Counter#2

My Love - Relationship Counter by Bjoern Bartels

Strong Contender
🌟 Lifestyle
4.9😊(681K ratings)
FreeIn-App Purchases
#34in Lifestyle
My Love - Relationship Counter screenshot 1

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.

What We Love

  • 💕 Helps keep track of relationship milestones
  • 📆 Provides detailed date information (days, weeks, months, years)
  • 🖼️ Allows customizing profile picture
  • 🔔 Sends notifications for special occasions

Room to Improve

  • 🔒 Requires payment for widget feature
  • 💰 Some users find the ads intrusive
  • 🕰️ Inaccurate date calculations for a few users
Time & Date Calculator#3

Time & Date Calculator by timeanddate.com

Perform calculations with time
Worth Considering
🔧 Utilities
3.4(66 ratings)
FreeIn-App Purchases
Time & Date Calculator screenshot 1
Time & Date Calculator screenshot 2
Time & Date Calculator screenshot 3
Time & Date Calculator screenshot 4
Time & Date Calculator screenshot 5

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.

More Date Calculator apps to explore

4
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
(28)
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
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
(177K)
free with in-app purchases
8
Days + Date + Time Calculator
Days + Date + Time Calculator
Days + Date + Time Calculator
Days Between Two Dates
Free

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.

Calculate days between datesCalculate duration between dates and timesCalculate duration between times
📊 Productivity
(795)
ad-supported
9
Date & Time Calculator: Days
Date & Time Calculator: Days
Date & Time Calculator: Days
Count Days and Workdays
Free

Calculate the duration between two dates, including workdays, or add/subtract time units to a specific date. This tool helps with planning, scheduling, and tracking time-sensitive tasks with a clean, minimalist interface.

Count days, months, years between datesAdd or subtract date and time unitsCalculate business days in a range
🔧 Utilities
(23)
free with in-app purchases
10
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
11
Simple Date Calculator
Simple Date Calculator
Simple Date Calculator
Date calculation made easy
$0.99
🔧 Utilities
(0)
12
Number of Days Calculator
Number of Days Calculator
Number of Days Calculator
Calculate number of days, date
Free
🔧 Utilities
(0)
13
Countdown & Count Up Timer
Countdown & Count Up Timer
Countdown & Count Up Timer
Event Reminders and Widgets
Free

Easily track important dates with customizable countdowns and count-ups. Never miss an anniversary, event, or milestone with home screen widgets and timely notifications. Personalize your tracking with custom backgrounds and text.

Unlimited event trackingHome and lock screen widgetsCustomizable notifications
📊 Productivity
(2.3K)
free with in-app purchases
14
Time and Date Calculator App
Time and Date Calculator App
Time and Date Calculator App
Date Calculator & Date Planner
Free
$0.99 | 100% OFF
🔧 Utilities
(0)
15
Date Calculator - TimeRange
Date Calculator - TimeRange
Date Calculator - TimeRange
Work day counter & countdown
Free

Easily calculate the difference between dates, add or subtract days, and create custom countdowns. Personalize your workweek and skip specific dates for accurate workday calculations. Track events with home screen widgets and receive timely notifications.

Add/subtract days, weeks, months, yearsCustomizable workweek calculationsSkip specific dates
📊 Productivity
(169)
free with in-app purchases
16
Date Calculator - Date Tools
Date Calculator - Date Tools
Date Calculator - Date Tools
Calculate the dates more easy
Free

Easily calculate the number of days between dates, with options to exclude holidays. Manage your schedule by creating events, setting alarms, and receiving timely notifications. This user-friendly tool simplifies time management.

Calculate days between datesExclude holidays from calculationsCreate events
🔧 Utilities
(0)
free
17
Day Calculator
Day Calculator
Day Calculator
by Alejandro Barrientos
Free
🔧 Utilities
(0)
18
Date calculator asst
Date calculator asst
Date calculator asst
Calculation date interval
Free
🔧 Utilities
(0)
19
Softricks Date Calculator
Softricks Date Calculator
Softricks Date Calculator
by Softricks Inc.
Free
🔧 Utilities
(0)
20
Date & Time Calculator +
Date & Time Calculator +
Date & Time Calculator +
Duration Between Two Dates
$0.99

Calculate the precise duration between any two dates and times, including seconds. Ideal for tracking personal milestones, workdays, or any time-sensitive event. Supports multiple time formats and time zones.

Calculate duration between two datesInclude minutes and seconds in calculationsAdd or subtract time from specific days
🔧 Utilities
(109)
free

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