# Time Calculator: Add, Subtract — Duration, Between, Different

> Calculate time durations, add/subtract time values, and manage time calculations. (iPhone/iPad app by Phan Nhat Đang.)

- Source: https://appshunter.io/ios/app/time-calculator-add-subtract/id1583726955 (this page in markdown: same URL + `.md`)
- Developer: [Phan Nhat Đang](https://appshunter.io/developer/1437390098)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Rating: 4.60/5 from 167 App Store ratings · 18 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 2 MB
- Languages: Russian, Hindi, Vietnamese, American English, Dutch, Danish, Indonesian, Latin American Spanish, Italian, Korean and 11 more
- Released: 2021-09-14
- Data updated: 2026-08-28
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/time-calculator-add-subtract/id1583726955/reviews.md

## What is Time Calculator?

Use this App to solve a wide range of time and date calculations. We provide tools to:

• Add or subtract two time values
• Add or subtract time from a starting date and time
• Calculate the duration between two times
• Calculate the duration between two dates

This App is simple, intuitive, and easy to use.

Results are estimates for informational purposes only.

We are very happy to serve you. If you have any requests, don't hesitate to contact us.
- https://www.facebook.com/phan.nhatdang.3/
- phannhatd@gmail.com

## Key features

- Add or subtract time values
- Add/subtract from a starting time and date
- Calculate time duration between two times
- Calculate time duration between two dates
- Intuitive and easy to use interface

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlock all features | $3.99 | one-time |


## Recent user reviews (10 of 18)

All indexed reviews: https://appshunter.io/ios/app/time-calculator-add-subtract/id1583726955/reviews.md

### 5/5 — Timesheets

*2026-06-26*

Amazing Calculator - has everything I need to calculate my timesheets easily and accurately

### 5/5 — Приложение супер

*2026-03-22*

Шикарно работает

### 2/5 — Give me money

*2026-03-10*

That’s all they want is money. Oh and the ads. Wonderful…

### 5/5 — 非常好用

*2026-01-15*

非常好用

### 5/5 — Accuracy Matters

*2026-01-10*

Excellent calculator for small business

### 3/5 — 複数登録と24時間制

*2025-10-08*

時間差を複数登録して管理したいので、複数の登録できること、24時間制もできるように選べると尚便利だと思いました。それができればいう事なしです。

### 1/5 — Pravin P

*2025-08-07*

Too many adds while using the application

### 1/5 — Can subtract time for free

*2025-08-06*

You can’t even subtract a time period from a set time unless you buy the pro version. 

I knew the free version would have ads and probably some features would be locked. But I still expected the free version to have all of the BASIC functionality of a “time calculator” (i.e., add AND subtract time).

### 2/5 — Not working

*2025-01-12*

I used to be able to add between two different times. And now each time I go and use it it keeps saying invalid start time when it never did that before. And it’s only when I paid for the full version so I don’t understand how now all of a sudden it’s not working. I want my money back and I’ll take the free version again because at least the free version actually worked. 
Update: I’m thought I’d give it another shot but, it STILL DOESNT WORK

### 2/5 — Not working

*2025-01-02*

I used to be able to add between two different times. And now each time I go and use it it keeps saying invalid start time when it never did that before. And it’s only when I paid for the full version so I don’t understand how now all of a sudden it’s not working. I want my money back and I’ll take the free version again because at least the free version actually worked.

## Frequently asked questions about Time Calculator

### What can this time calculator app do?

This app allows you to solve various time-related problems. You can add or subtract two time values, add or subtract from a starting time and date, and calculate the duration between two specific times or two different dates.

### Is this app free to use?

The app is free to download and use, but it does include advertisements and offers in-app purchases. These purchases may unlock additional features or remove ads.

### How do I calculate the time between two dates?

To calculate the duration between two dates, select the option for 'Time Duration Between Two Dates'. You will then be prompted to input the start date and the end date, and the app will display the calculated duration.

### What kind of calculations can I perform with time values?

You can perform several types of time calculations. This includes adding or subtracting specific time values (e.g., hours and minutes) and also adding or subtracting time from a given starting time and date.

## Version history (last 5 releases)

### 1.4.0 — 2026-06-09

Bug fixes and performance improvements

### 1.3.0 — 2026-04-23

Bug fixes and performance improvements

### 1.2.0 — 2023-08-07

Bug fixes and performance improvements

### 1.1.0 — 2023-07-17

Bug fixes and performance improvements

### 1.0 — 2021-09-14

No release notes.

## Apps similar to Time Calculator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Time Calculator - Work Hours](https://appshunter.io/ios/app/time-calculator-work-hours/id565039079) | 4.7 (2,819) | Free | Utilities |
| [Hours Tracker: Time Calculator](https://appshunter.io/ios/app/hours-tracker-time-calculator/id1468092377) | 4.7 (80,581) | Free | Utilities |
| [Hours Minutes Calculator Lite](https://appshunter.io/ios/app/hours-minutes-calculator-lite/id543277853) | 4.6 (2,954) | Free | Utilities |
| [Hours Calculator, Minutes Calc](https://appshunter.io/ios/app/hours-calculator-minutes-calc/id1591773406) | 4.4 (86) | Free | Utilities |
| [Wage Calculator- Hours Tracker](https://appshunter.io/ios/app/wage-calculator-hours-tracker/id1439328786) | 4.7 (106) | Free | Utilities |
| [TimeCalc: Time Calculator](https://appshunter.io/ios/app/timecalc-time-calculator/id1369060155) | 4.5 (88) | Free | Utilities |

## More apps by Phan Nhat Đang

- [Compound Interest Calc: Growth](https://appshunter.io/ios/app/compound-interest-calc-growth/id1437390099)
- [Weight loss journal, diary](https://appshunter.io/ios/app/weight-loss-journal-diary/id1455057273)
- [Basic grocery list + price](https://appshunter.io/ios/app/basic-grocery-list-plus-price/id1477000933)
- [GFR Calculator - eGFR Calc](https://appshunter.io/ios/app/gfr-calculator-egfr-calc/id1485507590)
- [Auto Loan Calculator - Car](https://appshunter.io/ios/app/auto-loan-calculator-car/id1487930075)
- [Mortgage Calculator: Payment](https://appshunter.io/ios/app/mortgage-calculator-payment/id1489668528)

All apps by Phan Nhat Đang: https://appshunter.io/developer/1437390098

## Related topics

[time duration calculator](https://appshunter.io/ios/topics/time-duration-calculator) · [elapsed time](https://appshunter.io/ios/topics/elapsed-time) · [durrat](https://appshunter.io/ios/topics/durrat) · [time difference calculator](https://appshunter.io/ios/topics/time-difference-calculator) · [add time](https://appshunter.io/ios/topics/add-time) · [calculate time](https://appshunter.io/ios/topics/calculate-time) · [time calculator](https://appshunter.io/ios/topics/time-calculator) · [decimal time converter](https://appshunter.io/ios/topics/decimal-time-converter)

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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 2026-08-28.*