# Smart Charge HK vs Slow Ink Clock

The clearest difference is in-app purchases: Smart Charge HK at none against Slow Ink Clock's 4. Smart Charge HK also leads on iOS requirement (11.0 vs 17.0). Slow Ink Clock's advantage is update cadence (every 9 days vs every 9 months). On price, ads 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. Smart Charge HK asks for nothing beyond the download.

Smart Charge HK ships an update every 9 months, Slow Ink Clock every 9 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | Smart Charge HK | Slow Ink Clock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 9 days** |
| Size | 60 MB | 376 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Smart Charge (HK) Limited](https://appshunter.io/developer/1191747508) | [Andrew Li](https://appshunter.io/developer/1886938485) |

## What reviewers say

### Smart Charge HK

[App page](https://appshunter.io/ios/app/smart-charge-hk/id1567190640)

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Smart Charge HK free?

Smart Charge HK is free to download, with no in-app purchases.

### Is Slow Ink Clock free?

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

### Do Smart Charge HK or Slow Ink Clock have ads?

Neither Smart Charge HK nor Slow Ink Clock shows ads.

### Which is updated more often, Smart Charge HK or Slow Ink Clock?

Smart Charge HK ships an update every 9 months, and Slow Ink Clock every 9 days. Most recently, Smart Charge HK was updated on October 25, 2026 and Slow Ink Clock 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.*