# 写作火火 vs 百思文库

The clearest difference is iOS requirement: 百思文库 at 12.0 against 写作火火's 15.3. On price and in-app purchases there is nothing between them.

Both are free to download. 写作火火 sells 3 one-off in-app purchases and 百思文库 sells 3 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | 写作火火 | 百思文库 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Size | 7 MB | 16 MB |
| Requires iOS | 15.3 | **12.0** |
| Age rating | 17+ | 17+ |
| Developer | [丹丹 陈](https://appshunter.io/developer/1748582081) | [敏飞 任](https://appshunter.io/developer/1733484219) |

## What reviewers say

### 写作火火

[App page](https://appshunter.io/ios/app/and-ai/id6475755921)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1个月会员 | $4.99 | one-time |
| 1年会员 | $9.99 | one-time |
| 终身会员 | $14.99 | one-time |


### 百思文库

[App page](https://appshunter.io/ios/app/ai/id6502648145)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 高级会员 | $2.99 | per 7 days |
| 高级会员 | $3.99 | per month |
| 高级会员 | $24.99 | per year |


## Frequently asked questions

### Is 写作火火 free?

写作火火 is free to download, with in-app purchases available.

### Is 百思文库 free?

百思文库 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.*