# 乐理手册 vs 音壳教唱歌

The clearest difference is in-app purchases: 音壳教唱歌 at none against 乐理手册's 5. 音壳教唱歌 also leads on iOS requirement (10.0 vs 14.0). On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. 乐理手册 sells 5 in-app purchases, starting at $5.99 per month. 音壳教唱歌 asks for nothing beyond the download.

乐理手册 ships an update every 2 weeks, 音壳教唱歌 weekly. The most recent releases landed on October 27, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | 乐理手册 | 音壳教唱歌 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (15 ratings)](https://appshunter.io/ios/app/id1572795413/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 64.1% of reviews | **66.7% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 312 MB | 56 MB |
| Requires iOS | 14.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Beijing Laiyin Innovation Technology Co., Ltd.](https://appshunter.io/developer/6810118949) | [鑫 孟](https://appshunter.io/developer/1264513934) |

## What reviewers say

### 乐理手册

[App page](https://appshunter.io/ios/app/id1572795413)

This app helps music enthusiasts learn music theory, practice sight-singing, and ear training. It offers a comprehensive question bank with art exam simulations and integrated ear training exercises to improve listening and vocal skills.

**Highlights:** Music theory question bank, Art exam simulations, Integrated sight-singing and ear training, Music theory dictionary, Sheet music practice with virtual keyboard

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 乐理手册-月会员 | $5.99 | per month |
| 乐理手册-季会员 | $5.99 | per 3 months |
| 乐理手册-年会员 | $17.99 | per year |
| 终身会员 | $2.99 | one-time |
| 1个月会员 | $7.99 | one-time |


### 音壳教唱歌

[App page](https://appshunter.io/ios/app/id1603754232)

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

**In-app purchases:** none


## Frequently asked questions

### Is 乐理手册 free?

乐理手册 is free to download, with in-app purchases available.

### Is 音壳教唱歌 free?

音壳教唱歌 is free to download, with no in-app purchases.

### Do 乐理手册 or 音壳教唱歌 have ads?

Neither 乐理手册 nor 音壳教唱歌 shows ads.

### Which is updated more often, 乐理手册 or 音壳教唱歌?

乐理手册 ships an update every 2 weeks, and 音壳教唱歌 weekly. Most recently, 乐理手册 was updated on October 27, 2026 and 音壳教唱歌 on September 25, 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.*