# 51飞鸟 vs 垃圾分类课堂

The clearest difference is review sentiment: 垃圾分类课堂 at 100% against 51飞鸟's 25%. 51飞鸟's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

51飞鸟 ships an update every 6 weeks, 垃圾分类课堂 every 2 months. The most recent releases landed on October 14, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 51飞鸟 | 垃圾分类课堂 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/id1479336914/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 25.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | **Free** | Ad-supported |
| Size | 60 MB | 283 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPad, iPod | 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) | [Shanghai NIJINGTECH Co.,Ltd.](https://appshunter.io/developer/1434588523) |

## 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


### 垃圾分类课堂

[App page](https://appshunter.io/ios/app/id1479336914)

Learn and test your waste sorting knowledge through interactive 3D scenarios. This app features a large question bank and professional explanations to help users of all ages understand proper waste disposal. It includes timed challenges to assess sorting skills.

**Highlights:** Interactive 3D learning scenarios, Extensive waste sorting question bank, Professional knowledge explanations, Timed sorting ability tests, Suitable for all ages

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 51飞鸟 free?

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

### Is 垃圾分类课堂 free?

垃圾分类课堂 is free to download, with no in-app purchases.

### Do 51飞鸟 or 垃圾分类课堂 have ads?

垃圾分类课堂 shows ads; 51飞鸟 does not.

### Which is updated more often, 51飞鸟 or 垃圾分类课堂?

51飞鸟 ships an update every 6 weeks, and 垃圾分类课堂 every 2 months. Most recently, 51飞鸟 was updated on October 14, 2026 and 垃圾分类课堂 on October 24, 2026.

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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.*