# DeepEng vs 牛牛星球

The clearest difference is in-app purchases: 牛牛星球 at none against DeepEng's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. DeepEng sells 2 one-off in-app purchases. 牛牛星球 asks for nothing beyond the download.

DeepEng ships an update weekly, 牛牛星球 every 6 days. The most recent releases landed on September 21, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | DeepEng | 牛牛星球 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Every 6 days** |
| Monetization | Free with in-app purchases | — |
| Size | 151 MB | 52 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [成都麦田外科技有限公司](https://appshunter.io/developer/1800915589) | [南宁未知教育科技有限公司](https://appshunter.io/developer/1841326967) |

## What reviewers say

### DeepEng

[App page](https://appshunter.io/ios/app/deepeng/id6746141434)

This immersive learning tool uses a "language vector space" theory and multimodal neural network training to help beginners acquire English naturally, like a native language. Its "scene-voice-semantics" system enhances learning efficiency.

**Highlights:** Immersive learning approach, Language vector space theory, Multimodal neural network training, Scene-voice-semantics system, Natural language acquisition, Zero-beginner friendly

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 5天体验卡 | $7.99 | one-time |
| 365天年卡 | $449.99 | one-time |


### 牛牛星球

[App page](https://appshunter.io/ios/app/id6752850121)

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

**In-app purchases:** none


## Frequently asked questions

### Is DeepEng free?

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

### Is 牛牛星球 free?

牛牛星球 is free to download, with no in-app purchases.

### Do DeepEng or 牛牛星球 have ads?

Neither DeepEng nor 牛牛星球 shows ads.

### Which is updated more often, DeepEng or 牛牛星球?

DeepEng ships an update weekly, and 牛牛星球 every 6 days. Most recently, DeepEng was updated on September 21, 2026 and 牛牛星球 on September 8, 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.*