Best Date Calculation Assistant Apps

239+ iOS apps curated and reviewed

4.2 avg rating
18 free apps
Updated August 2026

Every iPhone needs a few good date calculation assistant apps. We benchmark 239+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.

Compare top Date Calculation Assistant Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Date Calculation AssistantDate Calculation AssistantFreeβ€”NoYesJun 2026
2Date and Time CalculatorDate and Time CalculatorFree4.7β˜… (9.7K)YesNoAug 2026
3DayFinder - Date CalculatorDayFinder - Date CalculatorFreeβ€”YesNoMay 2026
4Date Calendar CalculatorDate Calendar CalculatorFree4.9β˜… (29)YesYesAug 2026
5Date&Datetime CalculatorDate&Datetime CalculatorFreeβ€”YesNoMay 2026
6Day CalculatorDay CalculatorFreeβ€”β€”NoMay 2026
7date and time calculator appdate and time calculator appFree5.0β˜… (1)NoNoAug 2026
8Date DurationDate DurationFreeβ€”NoNoMay 2026

Top Picks for Date Calculation Assistant

Date and Time Calculator#2

Date and Time Calculator by ε±± ι’Ÿ

Strong Contender
πŸ”§ 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

  • πŸ’‘ Helpful for tracking dates and time
  • πŸ‘ Simple and easy to use
  • πŸš€ Accurate calculations
  • πŸš€ Useful for various purposes (medication management, work timelines, etc.)

Room to Improve

  • πŸ› Ads are intrusive and difficult to close
  • πŸ› Compatibility issues on iPad
  • πŸ› Bugs with date/time calculations

More Date Calculation Assistant 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
πŸ”§ Utilities
(29)
free with in-app purchases
5
Date&Datetime Calculator
Date&Datetime Calculator
Date&Datetime Calculator
Simple and Easy
Free
πŸ”§ Utilities
(0)
6
Day Calculator
Day Calculator
Day Calculator
by Alejandro Barrientos
Free
πŸ”§ Utilities
(0)
7
date and time calculator app
date and time calculator app
date and time calculator app
Date Calculator,Time and Date
Free

This utility app offers precise calculations for dates and times, helping users manage events, projects, and track important dates. It provides features for calculating time differences, adding or subtracting dates and times, and determining exact age.

Time CalculatorDate Difference CalculatorTime Difference Calculator
πŸ”§ Utilities
(1)
free
8
Date Duration
Date Duration
Date Duration
Count Days Or Calculate Age
Free
πŸ“Š Productivity
(0)
9
Easy Date Calculator, Keyboard
Easy Date Calculator, Keyboard
Easy Date Calculator, Keyboard
Easily calculate target date
Free

Calculate future or past dates from a specific start point, or get the current date and time. Includes a custom keyboard for fast date entry in other applications and supports various date formats.

Calculate target datesGet current date and timeCustom keyboard for date entry
πŸ”§ Utilities
(15)
free
10
Date + Days Calculator
Date + Days Calculator
Date + Days Calculator
Add/Subtract days from date
Free

Easily calculate future or past dates by adding or subtracting a specified number of days from any given date. This tool offers a straightforward way to plan ahead or track past events with a user-friendly interface.

Add days to a dateSubtract days from a dateCalculate future dates
πŸ”§ Utilities
(3)
free
11
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
πŸ”§ Utilities
(0)
free
12
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
πŸ”§ Utilities
(131)
free with in-app purchases
13
Date & Time Calculator Counter
Date & Time Calculator Counter
Date & Time Calculator Counter
Date & Time Counter, Countdown
Free

Calculate the difference between dates and times, or add/subtract durations. Save your important calculations to bookmarks and enjoy a dark mode option. All features are free to use.

Calculate date, time, and date & time differencesAdd and subtract dates, times, and date & timesSave calculations to bookmarks
πŸ”§ Utilities
(27)
ad-supported
14
Date & Time Calculator - Quick and Simple
Date & Time Calculator - Quick and Simple
Date & Time Calculator - Quick and Simple
by Takahiro Kusano
Free

Calculate the difference between dates and times, or add time to specific dates. This tool helps determine days, years, and hours from significant events or between any two points in time.

Duration between two datesDuration between two date and timeDuration between two times
πŸ”§ Utilities
(3)
free
15
Date Time Calculator Free
Date Time Calculator Free
Date Time Calculator Free
Best tool for date and time
Free

Calculate the difference between two dates, add or subtract days and weeks, and get information about specific days. It helps you determine the number of days until important events or calculate future dates based on a given duration.

Calculate days between two datesAdd/subtract days and weeks from a dateDetermine weekday and week number
πŸ”§ Utilities
(2)
free
16
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
πŸ”§ Utilities
(66)
free with in-app purchases
17
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
πŸ“Š Productivity
(197)
free with in-app purchases
18
Time Jump - Date Calculator
Time Jump - Date Calculator
Time Jump - Date Calculator
With side-by-side calendars!
$7.99

Easily calculate the difference between dates, including business days, with side-by-side calendars. Add or subtract time periods and integrate with your device's calendar for event viewing and management.

Calculate days between datesBusiness day calculationsSide-by-side calendar view
πŸ”§ Utilities
(5)
paid
19
Date Calculator PW
Date Calculator PW
Date Calculator PW
No-nonsesne Date Calculator
Free

Easily calculate the difference between two dates or add/subtract time units to a specific date. This tool helps determine time spans, future dates, and past deadlines with straightforward operations.

Calculate time difference between two datesAdd days or other time units to a dateSubtract days or other time units from a date
πŸ“Š Productivity
(6)
free
20
Date and Time Calculator Pro
Date and Time Calculator Pro
Date and Time Calculator Pro
by ε±± ι’Ÿ
$0.99

Calculate the precise time difference between any two dates and times, down to the second. Easily determine future or past dates based on a specified duration. Ideal for tracking events, financial periods, or personal milestones.

Calculate time distance between datesCalculate days after a specific dateCalculate date before a specific date
πŸ”§ Utilities
(945)
free

FAQ about Date Calculation Assistant

Are there free date calculation assistant apps for iPhone?
Yes β€” 18 of the top date calculation assistant apps we rank are free to download, including Date Calculation Assistant and Date and Time Calculator.
Date Calculation Assistant has no ads and offers in-app purchases, according to its App Store listing as of August 2026.
We track 239+ date calculation assistant apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.