# TimeDeCalc — Time calculator

> A versatile time calculator with history, export, and advanced calculation options. (iPhone/iPad app by Osamu Masaki.)

- Source: https://appshunter.io/ios/app/timedecalc/id492365459 (this page in markdown: same URL + `.md`)
- Developer: [Osamu Masaki](https://appshunter.io/developer/376549555)
- Category: Business, Lifestyle
- Price: Free with in-app purchases
- Rating: 4.00/5 from 2 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 5 MB
- Languages: English, Japanese
- Released: 2012-01-07
- Data updated: 2026-08-10
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/timedecalc/id492365459/reviews.md

## What is TimeDeCalc?

Time calculator, This app is a tool to calculate the time. Major features 
1. To calculate the time.  
2. The record of the calculation process.  
3. To record the date and time calculations as history. 
4. To accumulate more total time.(TotalSum)
5. To modify or delete the calculation process.
6. Starting a new calculation from the calculation history.
7. You can output a csv file regarding the calculation history.


This app can be calculated by the combination of a variety of time. (seconds, minutes, hours, days)
You can change the time format if necessary.
The decimal point is supported up to 3 digits.
In addition, regarding the remaining number, you can choose from three options: rounding, rounding up, and rounding down.

The totaled data can be temporarily saved at the top of the calculation screen. We call this part the total sum.

The total sum cannot save the calculation history. But you can always mix it with the information currently being calculated.

The calculation result is automatically recorded in the history screen. The date and time at the time of calculation are recorded, so you can find it immediately.
You can also record a message by pressing the title edit button of each cell.

The calculation result is then displayed in the format in which it was calculated.

If you want to start a new calculation from the calculation results, select the New Calc button to automatically start a new calculation. Naturally, the calculation process up to that point is also recorded.

When you select each cell, it will automatically move to the screen for more detailed calculation process.

On the detailed calculation process screen, you can change the calculation order or delete the calculation in progress. However, if it becomes impossible to calculate, we will reject the request.

If you purchase additional functions, you will be provided with the function of voice-guided numbers and operators corresponding to the entered keys.

This app collects the development cost of this app with this paid part.

Additional features give you more flexibility in choosing the date display for historical data.

There may be an error in the calculation of the remainder. Please do not use this app for strict scientific calculations or calculations that do not allow errors.

About the contents of the CSV file
The CSV file outputs the calculation process and calculation result of the time calculation in this app.
Please use it when you want to check the time calculation or summarize the calculation results with spreadsheet software such as excel or Numbers.

## Key features

- Calculate time across seconds, minutes, hours, and days
- Record and manage calculation history
- Modify or delete past calculations
- Accumulate total time with 'TotalSum'
- Export calculation history to CSV
- Customize decimal precision and rounding

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Number Voice and Date Style | $0.99 | one-time |
| Tip for Developer as Type 1 | $0.99 | one-time |
| Tip for Developer as Type 2 | $1.99 | one-time |
| Tip for Developer as Type 3 | $2.99 | one-time |
| Tip for Developer as Type 9 | $8.99 | one-time |


## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/timedecalc/id492365459/reviews.md

### 5/5 — style

*2020-06-02*

hi there..
it’s very easy to use program, I love it 😎
but previous design was better, if possible add hour and minute ...🙏

**Developer response:** Thank you for your comment.
When creating the swift version, we excluded "hour", "minute", and "hour minute" from the time combinations. But I found that some needed it.
We will consider it as an additional item for the next version upgrade.

### 4/5 — So simple so good!

*2013-01-30*

Finally a simple time calculator, and free! I tried several, this is the one I use.

### 5/5 — Great

*2013-01-24*

Easy to use free

### 3/5 — Soustraction

*2012-09-26*

Ne semble pas avoir de soustraction...

## Frequently asked questions about TimeDeCalc

### What is TimeDeCalc used for?

TimeDeCalc is a tool designed to calculate and track time durations. It allows users to add, subtract, and manage time across various units like seconds, minutes, hours, and days, while also recording the history of these calculations.

### Can I export my calculations from TimeDeCalc?

Yes, TimeDeCalc allows you to export your calculation history as a CSV file. This is useful for reviewing time calculations or summarizing them using spreadsheet software like Excel or Numbers.

### Does TimeDeCalc support different time units?

Yes, TimeDeCalc supports calculations involving seconds, minutes, hours, and days. You can also change the time format and adjust decimal precision up to three digits.

### What are the additional functions available for purchase in TimeDeCalc?

Purchasing additional functions in TimeDeCalc provides voice-guided numbers and operators for entered keys, as well as more flexibility in choosing the date display for historical data.

### Is TimeDeCalc suitable for highly precise scientific calculations?

The developers advise against using TimeDeCalc for strict scientific calculations or those where errors are not permissible. There may be occasional errors in remainder calculations.

### How often is TimeDeCalc updated?

TimeDeCalc was last updated on April 4, 2025, indicating active development and maintenance. The latest version is 8.4.

### What devices is TimeDeCalc compatible with?

TimeDeCalc is available on Mac, iPhone, iPad, and iPod devices, making it accessible across various Apple platforms.

### What is the user rating for TimeDeCalc?

TimeDeCalc has a rating of 4.0 stars based on 2 user ratings, suggesting a generally positive user experience.

## Version history (last 5 releases)

### 9.1 — 2026-08-07

Function addition and function improvement
1) Supports iOS 26.6
2) Supports iPadOS 26.6

### 9.0 — 2026-04-10

Function addition and function improvement
1) Supporting iOS 26.4
2) Supporting iPadOS 26.4

### 8.4 — 2025-04-04

Function addition and function improvement
1) Supporting iOS 18.4
2) Supporting iPadOS 18.4

### 8.3 — 2025-02-07

Function addition and function improvement
1) Supporting iOS 18.3
2) Supporting iPadOS 18.3

### 8.2 — 2024-12-20

Function addition and function improvement
1) Supporting iOS 18.2
2) Supporting iPadOS 18.2

## Apps similar to TimeDeCalc

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [ClapHere POS](https://appshunter.io/ios/app/claphere-pos/id1542608939) | — | Free | Business |

## More apps by Osamu Masaki

- [FavoriteArtists](https://appshunter.io/ios/app/favoriteartists/id1484912058)
- [PhotoWith](https://appshunter.io/ios/app/photowith/id1492396777)
- [Cell Change](https://appshunter.io/ios/app/cell-change/id1523401827)
- [Title Check](https://appshunter.io/ios/app/title-check/id1529213192)
- [Car Drive](https://appshunter.io/ios/app/car-drive/id1543093087)

All apps by Osamu Masaki: https://appshunter.io/developer/376549555

## Related topics

[masaki individual](https://appshunter.io/ios/topics/masaki-individual)

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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 2026-08-10.*