# 六六牛APP vs Liaofan's Four Lessons

The clearest difference is in-app purchases: 六六牛APP at none against Liaofan's Four Lessons's 1. 六六牛APP also leads on iOS requirement (13.0 vs 15.0). Liaofan's Four Lessons's advantage is update cadence (weekly vs every 21 months) and device support. On price there is nothing between them.

Both are free to download. Liaofan's Four Lessons sells 1 one-off in-app purchase. 六六牛APP asks for nothing beyond the download.

六六牛APP ships an update every 21 months, Liaofan's Four Lessons weekly. The most recent releases landed on October 13, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | 六六牛APP | Liaofan's Four Lessons |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/liaofans-four-lessons/id6760946130/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | — | Yes |
| Update frequency | Every 21 months | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 29 MB | 82 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Jiujiang Smooth Education Software Co., LTD](https://appshunter.io/developer/1693031271) | [zhenyu song](https://appshunter.io/developer/1721282851) |

## What reviewers say

### 六六牛APP

[App page](https://appshunter.io/ios/app/app/id6473402856)

**In-app purchases:** none


### Liaofan's Four Lessons

[App page](https://appshunter.io/ios/app/liaofans-four-lessons/id6760946130)

Learn a 400-year-old personal development system in just 5 minutes daily. This app offers 92 structured lessons with audio, explanations, and exercises to help you understand destiny, correct faults, accumulate virtue, and cultivate humility. Track your progress and access all content offline.

**Highlights:** 92 daily learning units with audio, Classical Chinese with modern explanations, Self-reflection prompts, Application exercises, Progress tracking, Offline content access

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is 六六牛APP free?

六六牛APP is free to download, with no in-app purchases.

### Is Liaofan's Four Lessons free?

Liaofan's Four Lessons is free to download, with in-app purchases available.

### Which is updated more often, 六六牛APP or Liaofan's Four Lessons?

六六牛APP ships an update every 21 months, and Liaofan's Four Lessons weekly. Most recently, 六六牛APP was updated on October 13, 2026 and Liaofan's Four Lessons on October 10, 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.*