# 智齿在线SDKv7 vs 改字猫

The clearest difference is in-app purchases: 智齿在线SDKv7 at none against 改字猫's 3. 智齿在线SDKv7 also leads on iOS requirement (11.0 vs 15). 改字猫's advantage is update cadence (every 3 days vs every 28 months). On price, ads and device support there is nothing between them.

Both are free to download. 改字猫 sells 3 in-app purchases, starting at $4.99 per 7 days. 智齿在线SDKv7 asks for nothing beyond the download.

智齿在线SDKv7 ships an update every 28 months, 改字猫 every 3 days. The most recent releases landed on October 30, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | 智齿在线SDKv7 | 改字猫 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 3 days** |
| Size | 18 MB | 8 MB |
| Requires iOS | **11.0** | 15 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [北京智齿博创科技有限公司](https://appshunter.io/developer/1052666066) | [江帅 杨](https://appshunter.io/developer/6802702510) |

## What reviewers say

### 智齿在线SDKv7

[App page](https://appshunter.io/ios/app/sdkv7/id6475280393)

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

**In-app purchases:** none


### 改字猫

[App page](https://appshunter.io/ios/app/id6803838346)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周会员 | $4.99 | per 7 days |
| 月会员 | $9.99 | per month |
| 年会员 | $19.99 | per year |


## Frequently asked questions

### Is 智齿在线SDKv7 free?

智齿在线SDKv7 is free to download, with no in-app purchases.

### Is 改字猫 free?

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

### Do 智齿在线SDKv7 or 改字猫 have ads?

Neither 智齿在线SDKv7 nor 改字猫 shows ads.

### Which is updated more often, 智齿在线SDKv7 or 改字猫?

智齿在线SDKv7 ships an update every 28 months, and 改字猫 every 3 days. Most recently, 智齿在线SDKv7 was updated on October 30, 2026 and 改字猫 on October 29, 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.*