# Knock AI vs 压图

The clearest difference is ads: Knock AI at none against 压图's shown. 压图's advantage is update cadence (every 4 days vs fortnightly). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Knock AI ships an update fortnightly, 压图 every 4 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Knock AI | 压图 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/knock-ai/id6504226345/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Every 4 days** |
| Monetization | Free | — |
| Size | 47 MB | 16 MB |
| Requires iOS | **15.0** | 16 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [上海启扉绘梦智能科技有限公司](https://appshunter.io/developer/1751439886) | [志雄 黄](https://appshunter.io/developer/1877111087) |

## What reviewers say

### 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


### 压图

[App page](https://appshunter.io/ios/app/id6760404337)

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

**In-app purchases:** none


## Frequently asked questions

### Is Knock AI free?

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

### Is 压图 free?

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

### Do Knock AI or 压图 have ads?

压图 shows ads; Knock AI does not.

### Which is updated more often, Knock AI or 压图?

Knock AI ships an update fortnightly, and 压图 every 4 days. Most recently, Knock AI was updated on October 24, 2026 and 压图 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.*