# AI好老师 vs 北斗知识星球

The clearest difference is in-app purchases: AI好老师 at none against 北斗知识星球's 1. AI好老师 also leads on device support and iOS requirement (9.0 vs 11.0). On price there is nothing between them.

Both are free to download. 北斗知识星球 sells 1 one-off in-app purchase. AI好老师 asks for nothing beyond the download.

## The numbers

| Metric | AI好老师 | 北斗知识星球 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | — |
| Update frequency | Every 6 weeks | — |
| Size | 46 MB | 822 MB |
| Requires iOS | **9.0** | 11.0 |
| Devices | **iPhone, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [胜泉 余](https://appshunter.io/developer/1145773485) | [Beijing Dipper Publishing Co., Ltd.](https://appshunter.io/developer/1465064938) |

## What reviewers say

### AI好老师

[App page](https://appshunter.io/ios/app/ai/id1506126711)

**Features:** macOS Compatibility

**In-app purchases:** none


### 北斗知识星球

[App page](https://appshunter.io/ios/app/id6550893575)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 地球仪图片 | Free | one-time |


## Frequently asked questions

### Is AI好老师 free?

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

### Is 北斗知识星球 free?

北斗知识星球 is free to download, with in-app purchases available.

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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.*