# SignalClock vs Digital Japanese Clock

The clearest difference is price: Digital Japanese Clock at Free against SignalClock's $0.99. Digital Japanese Clock also leads on update cadence (every 6 weeks vs every 5 months). SignalClock's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

Digital Japanese Clock is free to download; SignalClock costs $0.99 up front. Digital Japanese Clock sells 1 one-off in-app purchase. SignalClock asks for nothing beyond the download.

SignalClock ships an update every 5 months, Digital Japanese Clock every 6 weeks. The most recent releases landed on October 26, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | SignalClock | Digital Japanese Clock |
| --- | --- | --- |
| Price | $0.99 | **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 | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 6 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 103 MB | 6 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Masafumi Endoh](https://appshunter.io/developer/757354996) | [Mihoko Araki](https://appshunter.io/developer/1476136915) |

## What reviewers say

### SignalClock

[App page](https://appshunter.io/ios/app/signalclock/id757354993)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is SignalClock free?

SignalClock costs $0.99, with no in-app purchases.

### Is Digital Japanese Clock free?

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

### Do SignalClock or Digital Japanese Clock have ads?

Digital Japanese Clock shows ads; SignalClock does not.

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

SignalClock ships an update every 5 months, and Digital Japanese Clock every 6 weeks. Most recently, SignalClock was updated on October 26, 2026 and Digital Japanese Clock on October 17, 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.*