# Digital Japanese Clock vs CIMOS鸿书

The clearest difference is in-app purchases: CIMOS鸿书 at none against Digital Japanese Clock's 1. CIMOS鸿书 also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Digital Japanese Clock sells 1 one-off in-app purchase. CIMOS鸿书 asks for nothing beyond the download.

Digital Japanese Clock ships an update every 6 weeks, CIMOS鸿书 every 4 weeks. The most recent releases landed on October 17, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Digital Japanese Clock | CIMOS鸿书 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/digital-japanese-clock/id1665402709/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 4 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 53 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mihoko Araki](https://appshunter.io/developer/1476136915) | [Qingdao City Brain Investment Development Co., Ltd](https://appshunter.io/developer/1531980409) |

## What reviewers say

### Digital Japanese Clock

[App page](https://appshunter.io/ios/app/digital-japanese-clock/id1665402709)

Experience the Edo period's unique timekeeping with this digital clock. It simulates the indefinite time method, dividing days and nights into variable lengths. Customize sounds, displays, and backgrounds for an immersive historical experience.

**Highlights:** Indefinite time method simulation, Customizable bell sounds (drums, cannons, cuckoo), Multiple display options (zodiac, numerals, emojis), Adjustable background color and font, Optional modern sub-clock display, Settings for time methods and display elements

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads | $1.99 | one-time |


### CIMOS鸿书

[App page](https://appshunter.io/ios/app/cimos/id6466782104)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Digital Japanese Clock free?

Digital Japanese Clock is free to download, with in-app purchases available.

### Is CIMOS鸿书 free?

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

### Do Digital Japanese Clock or CIMOS鸿书 have ads?

Digital Japanese Clock shows ads; CIMOS鸿书 does not.

### Which is updated more often, Digital Japanese Clock or CIMOS鸿书?

Digital Japanese Clock ships an update every 6 weeks, and CIMOS鸿书 every 4 weeks. Most recently, Digital Japanese Clock was updated on October 17, 2026 and CIMOS鸿书 on October 18, 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.*