# Calculator for Date and Time — Add or subtract dates and time > Calculate date and time differences, additions, subtractions, and durations. (iPhone/iPad app by Tairo Yoshioka.) - Source: https://appshunter.io/ios/app/calculator-for-date-and-time/id1526255055 (this page in markdown: same URL + `.md`) - Developer: [Tairo Yoshioka](https://appshunter.io/developer/1526255057) - Category: Productivity, Utilities - Price: Free with in-app purchases - Rating: 4.73/5 from 15 App Store ratings · 4 written reviews indexed - Age rating: 4+ - Requires: iOS 14.0 · 6 MB - Languages: English, Japanese, Korean, Russian, Chinese, Spanish, Chinese - Released: 2020-08-05 - Data updated: 2026-06-10 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/calculator-for-date-and-time/id1526255055/reviews.md ## What is Calculator for Date and Time? A date and time calculator app with a simple and easy-to-use interface. Function details: - Date addition and subtraction Calculates the date when the number of days and hours are added or subtracted from the start date. - Days and hours between two dates Calculate the number of days and hours between the start and end dates. You can specify whether to include the end date in the calculation result. - Elapsed time and remaining time Displays the elapsed time from the past date and time to the present, or the remaining time from the present to the future date and time. It is a countdown and countup timer function. - You can copy the calculation result to the clipboard by long-pressing it. - Since the calculation result is on the top and the input items are on the bottom, it is easy to use. - Lightweight and efficient interface optimized for the latest iOS. - Supports dark mode. ## Key features - Date addition and subtraction - Calculate days and hours between dates - Elapsed and remaining time tracking - Copy calculation results - Lightweight interface - Dark mode support ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Ad-free option | $0.99 | one-time | ## Recent user reviews (4 of 4) All indexed reviews: https://appshunter.io/ios/app/calculator-for-date-and-time/id1526255055/reviews.md ### 5/5 — Helpful for my job.……….. *2024-05-22* … ### 5/5 — I guess I can write two reviews? *2024-05-15* Basically I’m trying to contact someone about making it so you don’t have to push reset and the date is automatically on todays date. Like I used the app yesterday and it’s still saying May 14 (today May 15) unless I reset that and I’m worried one day I’ll forget to reset and mess up the dates **Developer response:** I’m very honored that you choose my app. Thank you! ### 5/5 — Add Hours To A Date !! *2024-04-07* Finally a time , date calculator I’ve been looking for. You can add hours to a date and see what the new date and time will be !! ### 5/5 — Needs to be more accurate with weeks, months and years *2021-01-08* Update I love this app. The only gripe I have with this is that when you show more results, it only list whole numbers. For example, January 20, 2018 to May 21, 2021, it lists as 3 years, 4 months, 1 day Months 40 Weeks 173 Days 1,217 Hours 29,207 Minutes 1,752,420 Seconds 105,145,200 I would prefer it to look like 3 years, 4 months, 1 day Years 3.33 Months 40.01 Weeks 173.86 Days 1,217 Hours 29,207 Minutes 1,752,420 Seconds 105,145,200 Otherwise, this is a good app! **Developer response:** Thanks for reviewing my app. This is a very helpful opinion, but the calculation becomes quite complicated due to the difference in the number of days each month and the calculation of leap years. I will consider implementing it in a future version. However, the results in "Show more results" can be copied by long-pressing in version 2.4. Update: Finally, in version 2.5, you can specify how to calculate between dates. By changing the settings, you can now display in decimals. Thank you. ## Frequently asked questions about Calculator for Date and Time ### How do I add or subtract days and hours using Calculator for Date and Time? Calculator for Date and Time allows you to input a start date and then add or subtract a specified number of days and hours to find the resulting date. The interface clearly separates input fields for easy manipulation. ### Can Calculator for Date and Time calculate the time between two specific dates? Yes, the app can calculate the exact number of days and hours between two specified dates. You have the option to include or exclude the end date in the final calculation result. ### Does Calculator for Date and Time have a countdown or countup timer feature? Yes, it functions as both a countdown and countup timer. It displays the elapsed time from a past date and time to the present, or the remaining time from the present to a future date and time. ### Is it easy to use the calculation results from Calculator for Date and Time? The app is designed for ease of use, with calculation results displayed prominently at the top and input items below. You can also easily copy any calculation result to your clipboard by long-pressing it. ### What devices does Calculator for Date and Time support? Calculator for Date and Time is optimized for the latest iOS and supports iPhone, iPad, and iPod devices. It also features a lightweight and efficient interface. ### Does Calculator for Date and Time have ads? Yes, Calculator for Date and Time contains advertisements. It is available for free with options for in-app purchases. ### How often is Calculator for Date and Time updated? The latest version, 2.8, was released on October 27, 2022. While specific update frequency isn't detailed, the app has seen regular updates since its release in August 2020. ### What is the age rating for Calculator for Date and Time? Calculator for Date and Time has an age rating of 4+, making it suitable for a wide range of users. Its simple interface and straightforward functionality contribute to its accessibility. ## Version history (last 5 releases) ### 2.8 — 2022-10-27 Code optimizations and library updates. ### 2.7 — 2022-02-22 Code optimizations and library updates. ### 2.6 — 2021-10-26 Code optimizations and library updates. ### 2.5 — 2021-01-08 You can now specify how to calculate between dates. ### 2.4 — 2020-12-01 Added the function to notify at the specified time of the timer. Added the function to copy each result in "Show more results" by long-pressing. Added the function to play the sound by the operation such as copy. ## Apps similar to Calculator for Date and Time | App | Rating | Price | Category | | --- | --- | --- | --- | | [Days + Date + Time Calculator](https://appshunter.io/ios/app/days-plus-date-plus-time-calculator/id816849128) | 4.7 (795) | Free | Productivity | | [Hours + Minutes Calculator Pro](https://appshunter.io/ios/app/hours-plus-minutes-calculator-pro/id811782529) | 4.5 (165) | Free | Productivity | | [WorkTime: Shift Work Calendar](https://appshunter.io/ios/app/worktime-shift-work-calendar/id1003684086) | 4.3 (4,531) | Free | Productivity | | [Shift Day Work Calendar: Spoke](https://appshunter.io/ios/app/shift-day-work-calendar-spoke/id1016565262) | 4.7 (14,336) | Free | Productivity | | [Shift Work Calendar & Schedule](https://appshunter.io/ios/app/shift-work-calendar-and-schedule/id1582981509) | 4.6 (231) | Free | Productivity | | [Time Card Calculator-Timeclock](https://appshunter.io/ios/app/time-card-calculator-timeclock/id672350386) | 4.5 (1,154) | Free | Productivity | ## More apps by Tairo Yoshioka - [Task Timer - Task Management](https://appshunter.io/ios/app/task-timer-task-management/id1533629883) All apps by Tairo Yoshioka: https://appshunter.io/developer/1526255057 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*