# Si4Keyboard vs 刻度打卡

The clearest difference is price: 刻度打卡 at Free against Si4Keyboard's $0.99. 刻度打卡 also leads on iOS requirement (15.6 vs 17.6). Si4Keyboard's advantage is in-app purchases (none vs 3) and update cadence (fortnightly vs every 2 months). On ads and device support there is nothing between them.

刻度打卡 is free to download; Si4Keyboard costs $0.99 up front. 刻度打卡 sells 3 in-app purchases, starting at $0.99 per month. Si4Keyboard asks for nothing beyond the download.

Si4Keyboard ships an update fortnightly, 刻度打卡 every 2 months. The most recent releases landed on October 25, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Si4Keyboard | 刻度打卡 |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Size | 14 MB | 2 MB |
| Requires iOS | 17.6 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [文焕 陈](https://appshunter.io/developer/1810161184) | [越 张](https://appshunter.io/developer/1810698182) |

## What reviewers say

### Si4Keyboard

[App page](https://appshunter.io/ios/app/si4keyboard/id6745263713)

**Features:** macOS Compatibility

**In-app purchases:** none


### 刻度打卡

[App page](https://appshunter.io/ios/app/id6746720055)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 刻度打卡月度会员 | $0.99 | per month |
| 刻度打卡年度会员 | $3.99 | per year |
| 刻度打卡终身会员 | $4.99 | one-time |


## Frequently asked questions

### Is Si4Keyboard free?

Si4Keyboard costs $0.99, with no in-app purchases.

### Is 刻度打卡 free?

刻度打卡 is free to download, with in-app purchases available.

### Do Si4Keyboard or 刻度打卡 have ads?

Neither Si4Keyboard nor 刻度打卡 shows ads.

### Which is updated more often, Si4Keyboard or 刻度打卡?

Si4Keyboard ships an update fortnightly, and 刻度打卡 every 2 months. Most recently, Si4Keyboard was updated on October 25, 2026 and 刻度打卡 on October 9, 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.*