Best Date Calendar Calculator Apps

204+ iOS apps curated and reviewed

4.6 avg rating
19 free apps
Updated June 2026

Looking for free date calendar calculator apps? 19 of our 204+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Top Picks for Date Calendar Calculator

Date Calendar Calculator#1

Date Calendar Calculator by Yuno Solutions Sdn Bhd

Calculate Calendar Date & Time
Editor's Choice
🔧 Utilities
4.9(28 ratings)
FreeAdsIn-App Purchases
Date Calendar Calculator screenshot 1
Date Calendar Calculator screenshot 2
Date Calendar Calculator screenshot 3
Date Calendar Calculator screenshot 4
Date Calendar Calculator screenshot 5
Date Calendar Calculator screenshot 6

This application helps users perform various date and time calculations, including finding durations between dates, calculating working days, converting between calendars and time zones, and estimating ovulation and pregnancy due dates. Download it today to access a comprehensive set of tools with a simple and intuitive design.

Date Calculator, Days Calc#2

Date Calculator, Days Calc by Phan Nhat Đang

Time: Add, Between, Difference
Strong Contender
🔧 Utilities
4.5(130 ratings)
FreeAdsIn-App Purchases
Date Calculator, Days Calc screenshot 1
Date Calculator, Days Calc screenshot 2
Date Calculator, Days Calc screenshot 3

A powerful yet intuitive application that allows you to effortlessly perform various date calculations, including determining the number of days between two dates, adding or subtracting from a date, and working with workdays. It's a versatile tool designed to make date-related tasks a breeze.

Date and Time Calculator#3

Date and Time Calculator by 山 钟

Worth Considering
🔧 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 time durations accurately with this tool, whether it's for financial planning or tracking important events. Get precise day-to-day calculations and plan ahead with ease.

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

More Date Calendar Calculator apps to explore

4
Time & Date Calculator
Time & Date Calculator
Time & Date Calculator
Perform calculations with time
Free

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🔧 Utilities
(66)
5
Time Calculator - Work Hours
Time Calculator - Work Hours
Time Calculator - Work Hours
Date, Calendar & Salary Clock
Free

An app designed to streamline work hours calculations, helping users track their time with precision. Simplify your scheduling and stay organized effortlessly with Time Calculator⁺.

🔧 Utilities
(2.7K)
6
Number of Days Calculator
Number of Days Calculator
Number of Days Calculator
Calculate number of days, date
Free
🔧 Utilities
(0)
7
J Chemistry
J Chemistry
J Chemistry
JChemistry Jyoti Rathi Inst
Free
📚 Education
(0)
8
Calendar
Calendar
Calendar
by Apple Distribution International
Free

Stay organized and effortlessly manage your schedule with this calendar application. Easily create separate calendars for different aspects of your life, view events across various accounts in one place, and enjoy synchronization across all your devices. Schedule events, receive notifications, and simplify meeting invitations with this all-in-one calendar tool.

📊 Productivity
(1.5M)
9
Countdown
Countdown
Countdown
Day Counter: Timer & Widget
Free

Track important dates and events with ease using this handy day counter and timer app. Never miss a deadline or special occasion again - download now to stay organized and prepared.

🔧 Utilities
(759)
10
Calendars: Schedule Planner
Calendars: Schedule Planner
Calendars: Schedule Planner
Reminder・Tasks Organizer・To Do
Free

Plan your day, schedule events, set reminders, and stay organized with this versatile calendar and planner app. Manage tasks, appointments, and to-do lists easily in one place. Download now and take control of your schedule!

📊 Productivity
(120K)
11
Tour Chat for TOURSTORY
Tour Chat for TOURSTORY
Tour Chat for TOURSTORY
Exclusive Ktourstory Service
Free
✈️ Travel
(0)
12
The Date Calculator PRO
The Date Calculator PRO
The Date Calculator PRO
Calculate days between dates
Free

Calculate time between dates or add/subtract time with The Date Calculator PRO. Perfect for calculating due dates and more. Download for free now!

🔧 Utilities
(2.5K)
13
Simple Calendar - SimpleCal
Simple Calendar - SimpleCal
Simple Calendar - SimpleCal
Tasks & ToDo for your schedule
Free

Stay organized and on top of your schedule with a user-friendly calendar app. Easily manage tasks, events, and appointments all in one place. Download now to simplify your life and never miss a beat!

📊 Productivity
(16K)
14
Date Calculator - TimeRange
Date Calculator - TimeRange
Date Calculator - TimeRange
Work day counter & countdown
Free

Calculate dates, intervals, and countdowns with our app! Add or subtract workdays, customize countdowns, and set up your workweek. Download now for efficient date management.

📊 Productivity
(169)
15
date and time calculator app
date and time calculator app
date and time calculator app
Date Calculator,Time and Date
Free
🔧 Utilities
(1)
16
Calendar · Planner & Reminders
Calendar · Planner & Reminders
Calendar · Planner & Reminders
Planner Organizer & Agenda
Free

Plan, organize, and manage your schedule effectively with this all-in-one planner and organizer app. Stay on top of your tasks, events, and appointments effortlessly. Download now to boost your productivity!

📊 Productivity
(59K)
17
PocketLife Calendar
PocketLife Calendar
PocketLife Calendar
Calendar Organizer & Reminders
Free

PocketLife Calendar is a versatile calendar organizer that helps you stay organized and never miss an important event. Manage your schedule effectively with ease. Download now for effortless event planning!

📊 Productivity
(41K)
18
Age Calculator Original
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Age Calculator Original
Calculate Chronological Age
Free

Calculate your age easily in various units like time, date, and year with the Age Calculator app. Save and share your age with friends, and even find out the time left until your next birthday. Available on both Android and iOS.

🌟 Lifestyle
(78)
19
Hours + Minutes Calculator Pro
Hours + Minutes Calculator Pro
Hours + Minutes Calculator Pro
Minutes + Seconds Calculator
Free

Calculate time easily with this app - enter hours, minutes, and seconds for precise calculations. Perfect for various time calculations like adding or subtracting days, hours, minutes, and more.

📊 Productivity
(165)
20
Between Dates Calendar Math
Between Dates Calendar Math
Between Dates Calendar Math
Quick, Easy Date Calculations
$0.99
$1.99 | 50% OFF

This application quickly calculates the number of days between two dates using a simple and intuitive interface, providing a range of features to save, view, and manipulate dates. Try it out to easily determine the number of days between two dates and explore its feature-rich functionality.

🔧 Utilities
(39)