# 音壳校园版 vs Jam

The clearest difference is in-app purchases: 音壳校园版 at none against Jam's 2. 音壳校园版 also leads on ads (none vs shown) and update cadence (fortnightly vs every 2 months). On price and device support there is nothing between them.

Both are free to download. Jam sells 2 in-app purchases, starting at $4.99 per 7 days. 音壳校园版 asks for nothing beyond the download.

音壳校园版 ships an update fortnightly, Jam every 2 months. The most recent releases landed on October 11, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 音壳校园版 | Jam |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (6 ratings)](https://appshunter.io/ios/app/jam-master/id6443654772/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 154 MB | 22 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [鑫 孟](https://appshunter.io/developer/1264513934) | [群 丁](https://appshunter.io/developer/555222254) |

## What reviewers say

### 音壳校园版

[App page](https://appshunter.io/ios/app/id1515070124)

**Features:** Vision Pro support

**In-app purchases:** none


### Jam

[App page](https://appshunter.io/ios/app/jam-master/id6443654772)

Practice and play along with original backing tracks for guitar, piano, bass, and ukulele. Visualize chord progressions and musical scales on interactive fretboards and keyboards. Adjust tempo and key, and loop sections for focused practice.

**Highlights:** Original backing tracks, Visual chord progressions, Fretboard and keyboard display, Adjustable tempo and key, Looping practice sections, 31 musical scales, 140+ chords

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscribe Weekly | $4.99 | per 7 days |
| Subscribe Monthly | $17.99 | per month |


## Frequently asked questions

### Is 音壳校园版 free?

音壳校园版 is free to download, with no in-app purchases.

### Is Jam free?

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

### Do 音壳校园版 or Jam have ads?

Jam shows ads; 音壳校园版 does not.

### Which is updated more often, 音壳校园版 or Jam?

音壳校园版 ships an update fortnightly, and Jam every 2 months. Most recently, 音壳校园版 was updated on October 11, 2026 and Jam 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.*