# Date and time calc vs Time Duration/Add Calculator

The clearest difference is device support: Time Duration/Add Calculator at 3 against Date and time calc's 1. Time Duration/Add Calculator also leads on iOS requirement (13.0 vs 17.6). On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Date and time calc ships an update every 11 months, Time Duration/Add Calculator every 9 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Date and time calc | Time Duration/Add Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/time-durationadd-calculator/id1521417824/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | **28.6% of reviews** | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 11 months | **Every 9 months** |
| Monetization | Ad-supported | Ad-supported |
| Size | 6 MB | 17 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Osamu Ishigami](https://appshunter.io/developer/901265058) | [Kouji Yamauchi](https://appshunter.io/developer/1519365107) |

## What reviewers say

### Date and time calc

[App page](https://appshunter.io/ios/app/date-and-time-calc/id949261920)

Easily calculate the difference between dates or add/subtract time intervals. This utility app simplifies date and time arithmetic with straightforward operations.

**Highlights:** Date difference calculation, Date addition and subtraction, Time difference calculation, Time addition and subtraction

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Time Duration/Add Calculator

[App page](https://appshunter.io/ios/app/time-durationadd-calculator/id1521417824)

Easily calculate elapsed time between two points or determine an end time based on a start time and duration. It also converts time into various units like days, hours, minutes, and seconds.

**Highlights:** Calculate elapsed time from start and end times, Calculate end time from start time and elapsed duration, Display time between start and end dates/times, Convert time into days, hours, minutes, and seconds, Easily enter current time, Calculate time before a given duration

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Date and time calc free?

Date and time calc is free to download, with no in-app purchases.

### Is Time Duration/Add Calculator free?

Time Duration/Add Calculator is free to download, with no in-app purchases.

### Do Date and time calc or Time Duration/Add Calculator have ads?

Both Date and time calc and Time Duration/Add Calculator show ads.

### Which is updated more often, Date and time calc or Time Duration/Add Calculator?

Date and time calc ships an update every 11 months, and Time Duration/Add Calculator every 9 months. Most recently, Date and time calc was updated on October 24, 2026 and Time Duration/Add Calculator on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*