# HPI vs Dozen Clock

The clearest difference is price: HPI at Free against Dozen Clock's $1.99. Dozen Clock's advantage is update cadence (every 2 days vs every 2 months) and device support (5 vs 2). On ads, in-app purchases and iOS requirement there is nothing between them.

HPI is free to download; Dozen Clock costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

HPI ships an update every 2 months, Dozen Clock every 2 days. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | HPI | Dozen Clock |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Size | 46 MB | 2 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Idwell GmbH](https://appshunter.io/developer/1269662593) | [Gergo Blasko](https://appshunter.io/developer/1767828070) |

## What reviewers say

### HPI

[App page](https://appshunter.io/ios/app/hpi/id1491749568)

**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 HPI free?

HPI is free to download, with no in-app purchases.

### Is Dozen Clock free?

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

### Do HPI or Dozen Clock have ads?

Neither HPI nor Dozen Clock shows ads.

### Which is updated more often, HPI or Dozen Clock?

HPI ships an update every 2 months, and Dozen Clock every 2 days. Most recently, HPI was updated on October 29, 2026 and Dozen Clock on October 27, 2026.

---

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