# 作业批改 vs 99上门

The clearest difference is in-app purchases: 99上门 at none against 作业批改's 4. 作业批改's advantage is device support. On price and iOS requirement there is nothing between them.

Both are free to download. 作业批改 sells 4 in-app purchases, starting at $1.99 per 7 days. 99上门 asks for nothing beyond the download.

## The numbers

| Metric | 作业批改 | 99上门 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | — |
| Update frequency | Every 3 weeks | — |
| Size | 17 MB | 69 MB |
| Requires iOS | 9.0 | 9.0 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 17+ |
| Developer | [小雪 赵](https://appshunter.io/developer/1617984478) | [逸翔 林](https://appshunter.io/developer/1533653354) |

## What reviewers say

### 作业批改

[App page](https://appshunter.io/ios/app/id1666160567)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 连续周订阅 | $1.99 | per 7 days |
| 连续月订阅 | $6.99 | per month |
| 连续年套餐 | $14.99 | per year |
| 年VIP会员 | $14.99 | one-time |


### 99上门

[App page](https://appshunter.io/ios/app/99/id6450409088)

**In-app purchases:** none


## Frequently asked questions

### Is 作业批改 free?

作业批改 is free to download, with in-app purchases available.

### Is 99上门 free?

99上门 is free to download, with no in-app purchases.

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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.*