# Date.Time Calculator

> Utility app for date, time, and interval calculations and unit conversions. (iPhone/iPad app by Noriaki HASHIBA.)

- Source: https://appshunter.io/ios/app/datetime-calculator/id978336078 (this page in markdown: same URL + `.md`)
- Developer: [Noriaki HASHIBA](https://appshunter.io/developer/978336077)
- Category: Utilities, Productivity
- Price: $0.99
- Age rating: 4+
- Requires: iOS 11.0 · 8 MB
- Languages: American English, Japanese
- Released: 2015-03-30
- Data updated: 2026-08-27
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/datetime-calculator/id978336078/reviews.md

## What is Date.Time Calculator?

You can quickly calculate Date / Time Point and Time Interval and unit conversion of time with a pure calculator feeling.

The Date.Time Calculator supports the following calculations.
- Arithmetical operations of numerical values ​​(integer and decimal)
- Arithmetic operations of numerical values ​​and Time Interval
- Operations between Time Interval (addition, subtraction, division)
- Operations of Time Interval and Time Point (addition, subtraction)
- Time Point operation (difference)
- Unit conversion of time
- Interconversion with POSIX Time
- Mutual conversion of time zones

Date.Time Calculator is useful for the following applications.
- What is the date 100 days after today?
- What is the date and time before 32768 seconds from now?
- When it is 1 minute 32.6 seconds per lap, what is the necessary time at 62 laps?
- Furthermore, the time after 62 laps?
- What is the number of days since January 23 this year?
- How many days is 100000 seconds?
- What is the date and time indicated by 1234567890 seconds at POSIX Time?
- What seconds is it now to express with POSIX Time?

Also, it can be utilized variously depending on ingenuity.

## Key features

- Date and time point calculations
- Time interval calculations
- Unit conversion of time
- POSIX time interconversion
- Time zone mutual conversion
- Arithmetic operations with time

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/datetime-calculator/id978336078/reviews.md

### 3/5 — 計算結果をコピーできるようにして欲しい。

*2024-07-12*

DiscordでUnix時間を使ってタイムスタンプ表示するのに良さそうかな？と思って課金しました。
ですが折角計算結果が出ても、別の画面に切り替えたらわからなくなるので計算結果をコピーできるようにして欲しいです。
これだとWebに飛んで日付時刻入れて結果をコピーする方が早いので…

また、計算結果の履歴がないので履歴が残せるとありがたいです。
そして、iPadで使用した際にSplitViewに対応すると嬉しいです

## Frequently asked questions about Date.Time Calculator

### What kind of calculations can Date.Time Calculator perform?

Date.Time Calculator supports arithmetic operations on numerical values and time intervals, operations between time intervals, and operations of time intervals with time points. It also handles time point differences and unit conversions.

### How does Date.Time Calculator handle time zone conversions?

The app allows for mutual conversion of time zones, enabling users to easily see how dates and times correspond across different regions.

### Can Date.Time Calculator convert to and from POSIX time?

Yes, Date.Time Calculator supports interconversion with POSIX time, allowing you to translate between human-readable dates and the seconds since the Unix epoch.

### What devices is Date.Time Calculator available on?

Date.Time Calculator is available for iPhone and iPod devices.

### How often is Date.Time Calculator updated?

The app was last updated on May 31, 2023, indicating regular maintenance and potential feature additions.

### What is the age rating for Date.Time Calculator?

Date.Time Calculator has an age rating of 4+, making it suitable for a wide range of users.

### Does Date.Time Calculator have ads?

No, Date.Time Calculator does not contain advertisements.

### What is the price of Date.Time Calculator?

Date.Time Calculator is a paid application, available for $0.99.

## Version history (last 5 releases)

### 1.3.9 — 2023-05-31

Date.Time Calculator 1.3.9 includes the following improvements and updates:
- Fixed button layout issues.
- Updated to support and optimize for the latest SDK.
- Minimum required iOS version has been changed to 11.0.

### 1.3.8 — 2021-11-20

Date.Time Calculator 1.3.8 is a version that focuses on the following updates:
- Optimized for the latest SDK.
- Updated help and reference files.
- Updated App Icon.

### 1.3.7 — 2020-04-29

Date.Time Calculator 1.3.7 contains improvements and fixes for the following issues
- UI: Improved the layout of the time zone selection area.
- UI: Fix the display font problem of the unit.
- UI: Improved layout and color scheme.

### 1.3.6 — 2019-11-19

Date.Time Calculator 1.3.6 is a version focused on improving the following issue:
- UI: Improved compatibility in Dark mode.

### 1.3.5 — 2019-10-22

Date.Time Calculator 1.3.5 is a version that focuses on the following updates:
- Compatibility: Improved compatibility with iOS 13.
- Help: Updated help files.

## More apps by Noriaki HASHIBA

- [TQ Communicator](https://appshunter.io/ios/app/tq-communicator/id1147890329)
- [TQ Communicator Lite](https://appshunter.io/ios/app/tq-communicator-lite/id1156322861)
- [TQ Communicator Pro](https://appshunter.io/ios/app/tq-communicator-pro/id1185283636)
- [Namadu Epicenter Viewer](https://appshunter.io/ios/app/namadu-epicenter-viewer/id1264409388)
- [Namadu Epicenter Viewer Lite](https://appshunter.io/ios/app/namadu-epicenter-viewer-lite/id1275499631)

All apps by Noriaki HASHIBA: https://appshunter.io/developer/978336077

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*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 2026-08-27.*