# Time Calc. Pro vs Time Duration/Add Calculator

The clearest difference is price: Time Duration/Add Calculator at Free against Time Calc. Pro's $0.99. Time Duration/Add Calculator also leads on update cadence (every 9 months vs every 28 months). Time Calc. Pro's advantage is ads (none vs shown). On in-app purchases, device support and iOS requirement there is nothing between them.

Time Duration/Add Calculator is free to download; Time Calc. Pro costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Time Calc. Pro ships an update every 28 months, Time Duration/Add Calculator every 9 months. The most recent releases landed on October 8, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Time Calc. Pro | Time Duration/Add Calculator |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | — | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 28 months | **Every 9 months** |
| Monetization | — | Ad-supported |
| Size | 2 MB | 17 MB |
| Requires iOS | 13.4 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hiroyuki Nishijima](https://appshunter.io/developer/1389796249) | [Kouji Yamauchi](https://appshunter.io/developer/1519365107) |

## What reviewers say

### Time Calc. Pro

[App page](https://appshunter.io/ios/app/time-calc-pro/id1509605480)

**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 Time Calc. Pro free?

Time Calc. Pro costs $0.99, 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 Time Calc. Pro or Time Duration/Add Calculator have ads?

Time Duration/Add Calculator shows ads; Time Calc. Pro does not.

### Which is updated more often, Time Calc. Pro or Time Duration/Add Calculator?

Time Calc. Pro ships an update every 28 months, and Time Duration/Add Calculator every 9 months. Most recently, Time Calc. Pro was updated on October 8, 2026 and Time Duration/Add Calculator on October 13, 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.*