# Hour Calc vs Dozen Clock

The clearest difference is update cadence: Dozen Clock at every 2 days against Hour Calc's every 3 months. Dozen Clock also leads on device support (5 vs 3). Hour Calc's advantage is price ($0.99 vs $1.99) and iOS requirement (8.0 vs 15.0). On ads and in-app purchases there is nothing between them.

Hour Calc costs $0.99 and Dozen Clock $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Hour Calc ships an update every 3 months, Dozen Clock every 2 days. The most recent releases landed on September 6, 2026 and August 7, 2026 respectively.

## The numbers

| Metric | Hour Calc | Dozen Clock |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/hour-calc/id361991529/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 87.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 days** |
| Monetization | Paid | — |
| Size | 8 MB | 2 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Guenter Freytag](https://appshunter.io/developer/358874068) | [Gergo Blasko](https://appshunter.io/developer/1767828070) |

## What reviewers say

### Hour Calc

[App page](https://appshunter.io/ios/app/hour-calc/id361991529)

Converts time between hours:minutes and decimal hours formats. Features include easy input, minute validation, and autocompletion for readability. Supports iPhone and iPad with autosized tables.

**Highlights:** Hours:minutes to decimal hours conversion, Decimal hours to hours:minutes conversion, Easy number keypad input, Minute input validation, Autocompletion for readability, Native iPad support

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

**In-app purchases:** none


### Dozen Clock

[App page](https://appshunter.io/ios/app/dozen-clock/id6733246889)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Hour Calc free?

Hour Calc costs $0.99, with no in-app purchases.

### Is Dozen Clock free?

Dozen Clock costs $1.99, with no in-app purchases.

### Do Hour Calc or Dozen Clock have ads?

Neither Hour Calc nor Dozen Clock shows ads.

### Which is updated more often, Hour Calc or Dozen Clock?

Hour Calc ships an update every 3 months, and Dozen Clock every 2 days. Most recently, Hour Calc was updated on September 6, 2026 and Dozen Clock on August 7, 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.*