# 神笔小AI vs Knock AI

The clearest difference is in-app purchases: Knock AI at none against 神笔小AI's 3. Knock AI also leads on update cadence (fortnightly vs monthly). 神笔小AI's advantage is iOS requirement (9.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. 神笔小AI sells 3 one-off in-app purchases. Knock AI asks for nothing beyond the download.

神笔小AI ships an update monthly, Knock AI fortnightly. The most recent releases landed on May 19, 2026 and August 19, 2026 respectively.

## The numbers

| Metric | 神笔小AI | Knock AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/knock-ai/id6504226345/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | — | Free |
| Size | 41 MB | 47 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chenyu Zhiyun Hangzhou Technology Co., Ltd.](https://appshunter.io/developer/1674084920) | [上海启扉绘梦智能科技有限公司](https://appshunter.io/developer/1751439886) |

## What reviewers say

### 神笔小AI

[App page](https://appshunter.io/ios/app/ai/id6445832815)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 幸运值 | $0.99 | one-time |
| 幸运值(加送1000) | $12.99 | one-time |
| 幸运值(加送10000) | $124.99 | one-time |


### Knock AI

[App page](https://appshunter.io/ios/app/knock-ai/id6504226345)

This AI-powered platform helps parents and children create personalized stories, picture books, and nursery rhymes. Users can choose themes and age tags to generate unique content, fostering creativity and documenting a child's growth journey.

**Highlights:** AI story and picture book generation, AI nursery rhyme creation, Customizable themes and age tags, Free library of stories and rhymes, Story collection for child's growth

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

**In-app purchases:** none


## Frequently asked questions

### Is 神笔小AI free?

神笔小AI is free to download, with in-app purchases available.

### Is Knock AI free?

Knock AI is free to download, with no in-app purchases.

### Do 神笔小AI or Knock AI have ads?

Neither 神笔小AI nor Knock AI shows ads.

### Which is updated more often, 神笔小AI or Knock AI?

神笔小AI ships an update monthly, and Knock AI fortnightly. Most recently, 神笔小AI was updated on May 19, 2026 and Knock AI on August 19, 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.*