# AIFly vs 省心文库

The clearest difference is device support: AIFly at 3 against 省心文库's —. On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. AIFly sells 2 in-app purchases, starting at $1.99 per 7 days and 省心文库 sells 4 in-app purchases, starting at $9.99 per 7 days. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | AIFly | 省心文库 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | — |
| Update frequency | Every 9 days | — |
| Size | 20 MB | 13 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 17+ | 17+ |
| Developer | [晓宁 师](https://appshunter.io/developer/1682442206) | [冬冬 吴](https://appshunter.io/developer/1713806961) |

## What reviewers say

### AIFly

[App page](https://appshunter.io/ios/app/aifly-plus-ai-plus/id6447962215)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周费会员 | $1.99 | per 7 days |
| 年费会员 | $12.99 | per year |


### 省心文库

[App page](https://appshunter.io/ios/app/id6470998690)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周会员 | $9.99 | per 7 days |
| 月会员 | $14.99 | per month |
| 年会员 | $29.99 | per year |
| 永久会员（移动端+PC端） | $39.99 | one-time |


## Frequently asked questions

### Is AIFly free?

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

### Is 省心文库 free?

省心文库 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.*