# One Kanji Clock vs SunForecast

The clearest difference is ads: SunForecast at none against One Kanji Clock's shown. SunForecast also leads on update cadence (every 5 days vs every 2 months). One Kanji Clock's advantage is iOS requirement (12.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. One Kanji Clock sells 1 one-off in-app purchase and SunForecast sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

One Kanji Clock ships an update every 2 months, SunForecast every 5 days. The most recent releases landed on October 19, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | One Kanji Clock | SunForecast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/sunforecast/id6745263927/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | — | Free with in-app purchases |
| Size | 18 MB | 106 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Apple Watch, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Mihoko Araki](https://appshunter.io/developer/1476136915) | [Maxime Pontoire](https://appshunter.io/developer/525396222) |

## What reviewers say

### 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 |


### SunForecast

[App page](https://appshunter.io/ios/app/sunforecast/id6745263927)

Predicts the quality of sunrises and sunsets based on weather and atmospheric data. Offers customizable notifications, photography tips, and multi-location support for capturing the best sky moments.

**Highlights:** Sunrise/sunset quality predictions, Customizable notifications, Multi-location support, Home screen widget, Photography tips, Adaptive interface

**Features:** macOS Compatibility, Apple Watch app, iPhone Duo support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Yearly | $14.99 | per year |


## Frequently asked questions

### Is One Kanji Clock free?

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

### Is SunForecast free?

SunForecast is free to download, with in-app purchases available.

### Do One Kanji Clock or SunForecast have ads?

One Kanji Clock shows ads; SunForecast does not.

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

One Kanji Clock ships an update every 2 months, and SunForecast every 5 days. Most recently, One Kanji Clock was updated on October 19, 2026 and SunForecast on October 25, 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.*