# SignalClock Lite vs One Kanji Clock

The clearest difference is in-app purchases: SignalClock Lite at none against One Kanji Clock's 1. SignalClock Lite also leads on ads (none vs shown). One Kanji Clock's advantage is update cadence (every 2 months vs every 7 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. One Kanji Clock sells 1 one-off in-app purchase. SignalClock Lite asks for nothing beyond the download.

SignalClock Lite ships an update every 7 months, One Kanji Clock every 2 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | SignalClock Lite | One Kanji Clock |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 28 MB | 18 MB |
| Requires iOS | 12.0 | 12.0 |
| 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 Lite

[App page](https://appshunter.io/ios/app/signalclock-lite/id908918011)

This utility app displays a digital clock with a time signal function using local notifications. It offers multiple sound sets and font options. The free version has limitations on scheduling time signals to half-hour intervals.

**Highlights:** Local notification time signals, Multiple sound sets, iOS 10 font support, Half-hour signal scheduling (free edition), Digital clock display

**Features:** macOS Compatibility

**In-app purchases:** none


### One Kanji Clock

[App page](https://appshunter.io/ios/app/one-kanji-clock/id6468893847)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Kanji Clock with no ads | $2.99 | one-time |


## Frequently asked questions

### Is SignalClock Lite free?

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

### Is One Kanji Clock free?

One Kanji Clock is free to download, with in-app purchases available.

### Do SignalClock Lite or One Kanji Clock have ads?

One Kanji Clock shows ads; SignalClock Lite does not.

### Which is updated more often, SignalClock Lite or One Kanji Clock?

SignalClock Lite ships an update every 7 months, and One Kanji Clock every 2 months. Most recently, SignalClock Lite was updated on November 1, 2026 and One Kanji Clock on November 3, 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.*