Best Day Calculator Apps

231+ iOS apps curated and reviewed

4.6 avg rating
17 free apps
Updated May 2026

From beginner-friendly picks to power-user tools, our day calculator list covers 231+ iPhone apps updated through May 2026. Compare ratings, prices, and screenshots in one place.

Top Picks for Day Calculator

Date and Time Calculator#1

Date and Time Calculator by ε±± ι’Ÿ

Editor's Choice
πŸ”§ 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

  • 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
DayCount#2

DayCount by Zaminiti Pty Ltd

Countdown Days Until Or Since
Strong Contender
πŸ“Š 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

What We Love

  • πŸ‘ Intuitive and easy to use
  • πŸš€ Clean and fast app
  • πŸ’‘ Customizable backgrounds and themes
  • 🎨 Beautiful and visually appealing design

Room to Improve

  • πŸ”’ Requires sign-in/account to use full features
  • πŸ’° Paid subscription for advanced features
  • πŸ› Bugs and glitches after updates
Countdown#3

Countdown by Find Appiness LLC

Day Counter: Timer & Widget
Worth Considering
πŸ”§ Utilities
4.8😊(172K ratings)
FreeAdsIn-App Purchases
#46in Utilities
Countdown screenshot 1
Countdown screenshot 2
Countdown screenshot 3
Countdown screenshot 4
Countdown screenshot 5

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.

What We Love

  • πŸ‘ Simple and intuitive interface
  • 🎨 Customizable colors and emojis
  • ⏰ Accurate countdown tracking
  • πŸ”” Helpful reminders and notifications

Room to Improve

  • πŸ’Έ Paid widget feature
  • πŸ” Lack of instructions/guidance
  • πŸ”€ Inconsistent countdown display on widget

More Day Calculator apps to explore

4
Days + Date + Time Calculator
Days + Date + Time Calculator
Days + Date + Time Calculator
Days Between Two Dates
Free

Calculate the number of days, duration between dates, and time intervals with this versatile application. Easily determine the days, dates, and times between two points - Try it now!

πŸ“Š Productivity
(795)
5
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!

πŸ”§ Utilities
(2.5K)
6
Day Calculator
Day Calculator
Day Calculator
by Alejandro Barrientos
Free
πŸ”§ Utilities
(0)
7
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⁺.

πŸ”§ Utilities
(2.4K)
8
Date Calculator, Days Calc
Date Calculator, Days Calc
Date Calculator, Days Calc
Time: Add, Between, Difference
Free

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.

πŸ”§ Utilities
(130)
9
DayCalc - Note Calculator
DayCalc - Note Calculator
DayCalc - Note Calculator
Calculator & Unit Converter
Free

In a few sentences, the application can be described as a comprehensive calculator and unit converter that offers a live voice calculator, scientific and fraction calculations, seamless conversion between over 600 units, currency exchange rates, custom units, and a range of customization options. The app provides a visually appealing and user-friendly interface, catering to the needs of iPhone, iPad, and Apple Watch users.

πŸ”§ Utilities
(124)
10
Day Calculator Elite
Day Calculator Elite
Day Calculator Elite
by Chuk Fong Ng
Free
πŸ”§ Utilities
(0)
11
Days since - Countdown
Days since - Countdown
Days since - Countdown
Cute day counter & reminder
Free

Track and monitor important milestones with ease using this app. Stay organized by counting days since or until any event. Try it now for a hassle-free way to stay on top of your important dates.

πŸ“Š Productivity
(1.5K)
12
Countdown  β€Ž
Countdown  β€Ž
Countdown β€Ž
Countdown Widget & Timer
Free

Track important events and stay organized with Countdown. Set up customizable countdown timers to stay on top of deadlines, special occasions, and more. Download now and never miss a moment!

🌟 Lifestyle
(11K)
13
ClevCalc - Calculator
ClevCalc - Calculator
ClevCalc - Calculator
All-In-One Calculator
Free

A comprehensive all-in-one calculator app with features like scientific calculator, unit converter, currency converter, percentage calculator, and more for everyday use. It provides a wide range of calculation tools from basic arithmetic to complex conversions and financial calculations. Try it out now for convenient and efficient calculations!

πŸ“Š Productivity
(12K)
14
Hours Minutes Calculator Lite
Hours Minutes Calculator Lite
Hours Minutes Calculator Lite
by Quackstro
Free

This application helps users calculate hours and minutes quickly and competently. Whether for work, study, or personal use, it simplifies time calculations. Try it now for a hassle-free approach to managing your time effectively!

πŸ”§ Utilities
(2.9K)
15
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.

πŸ“Š Productivity
(165)
16
Calculatorβ‚Š
Calculatorβ‚Š
Calculatorβ‚Š
Basic, Scientific, Plus Calc
Free

Try Calculatorβ‚Š, the ultimate mathematics tool offering basic, scientific, and plus calculations. Ideal for homework, exams, and managing expenses, this app is like having a personal math tutor on your phone. Download now for easy and intuitive math solutions!

πŸ”§ Utilities
(1.7M)
17
Date & Time Calculator(9 in 1)
Date & Time Calculator(9 in 1)
Date & Time Calculator(9 in 1)
Best tool to work with time
$0.99

Meet new people through video chats based on your interests. Simply set up your profile, choose your preferences, and start connecting with others instantly. Find like-minded individuals and engage in meaningful conversations today!

πŸ’Ό Business
(246)
18
Calculator ∞
Calculator ∞
Calculator ∞
The Best Scientific Calculator
$5.99

A top-rated scientific calculator app on iOS devices offering advanced math functions with a user-friendly interface for users of all levels. Features include step-by-step solutions, math photo solving, and handwriting recognition. Enhance your calculations with this versatile tool.

πŸ“š Education
(6.2K)
19
Time + Date Calculator
Time + Date Calculator
Time + Date Calculator
Best tool to work with time
$0.99

Utilize the ultimate Time and Date Calculator app for seamless time management. Calculate time differences, workdays, add/subtract time, convert between various units, predict future dates, manage time zones, determine your age, and plan trips efficiently. Download now for enhanced productivity.

πŸ”§ Utilities
(944)
20
Countdown App Free (Big Day Event Timer Reminder)
Countdown App Free (Big Day Event Timer Reminder)
Countdown App Free (Big Day Event Timer Reminder)
by JINMIN ZHOU
Free

Stay on track with your important events using this Countdown app. Count down to future dates like birthdays and holidays, or reminisce about past special moments. Set reminders, customize backgrounds, and share your joy with others. Download now and never miss a memorable moment!

πŸ”§ Utilities
(1.4K)

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