# Slow Ink Clock vs Luck日子

The clearest difference is update cadence: Luck日子 at every 3 days against Slow Ink Clock's every 9 days. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Slow Ink Clock sells 4 in-app purchases, starting at $0.99 per month and Luck日子 sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Slow Ink Clock ships an update every 9 days, Luck日子 every 3 days. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Slow Ink Clock | Luck日子 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 3 days** |
| Size | 376 MB | 26 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Li](https://appshunter.io/developer/1886938485) | [兵 李](https://appshunter.io/developer/1888184886) |

## What reviewers say

### Slow Ink Clock

[App page](https://appshunter.io/ios/app/slow-ink-clock/id6772479285)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ink Weather Monthly | $0.99 | per month |
| Ink Weather Yearly | $5.99 | per year |
| Slow Ink Clock Font Pack | $0.99 | one-time |
| Slow Ink Clock Lifetime | $14.99 | one-time |


### Luck日子

[App page](https://appshunter.io/ios/app/luck/id6808837559)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 择日月卡 | $1.99 | per month |
| 择日年卡 | $14.99 | per year |
| 择日 10 次卡 | $0.99 | one-time |


## Frequently asked questions

### Is Slow Ink Clock free?

Slow Ink Clock is free to download, with in-app purchases available.

### Is Luck日子 free?

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

### Do Slow Ink Clock or Luck日子 have ads?

Neither Slow Ink Clock nor Luck日子 shows ads.

### Which is updated more often, Slow Ink Clock or Luck日子?

Slow Ink Clock ships an update every 9 days, and Luck日子 every 3 days. Most recently, Slow Ink Clock was updated on October 25, 2026 and Luck日子 on October 31, 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.*