# 51飞鸟 vs 错题本·学伴

The clearest difference is in-app purchases: 51飞鸟 at none against 错题本·学伴's 2. 51飞鸟 also leads on device support and iOS requirement (12.0 vs 15.0). On price there is nothing between them.

Both are free to download. 错题本·学伴 sells 2 in-app purchases, starting at $2.99 per month. 51飞鸟 asks for nothing beyond the download.

## The numbers

| Metric | 51飞鸟 | 错题本·学伴 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | — |
| Update frequency | Every 6 weeks | — |
| Monetization | Free | — |
| Size | 60 MB | 8 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [北京学研汇智网络科技有限公司](https://appshunter.io/developer/1171097549) | [大勇 阎](https://appshunter.io/developer/1068052430) |

## What reviewers say

### 51飞鸟

[App page](https://appshunter.io/ios/app/51/id1301860494)

This application helps university students improve their English skills through online learning. It allows users to view course lists, check in online, practice tests, and communicate with peers. The platform also tracks assignment completion.

**Highlights:** Online English courses, Course list viewing, Online check-in, Practice test exercises, Peer communication, Assignment tracking

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

**In-app purchases:** none


### 错题本·学伴

[App page](https://appshunter.io/ios/app/id6448768023)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 包月 | $2.99 | per month |
| 包年 | $24.99 | per year |


## Frequently asked questions

### Is 51飞鸟 free?

51飞鸟 is free to download, with no in-app purchases.

### Is 错题本·学伴 free?

错题本·学伴 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.*