# Music Guide & Encyclopedia vs COBIT Design & Implement Prep

The clearest difference is in-app purchases: COBIT Design & Implement Prep at none against Music Guide & Encyclopedia's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Music Guide & Encyclopedia sells 1 one-off in-app purchase. COBIT Design & Implement Prep asks for nothing beyond the download.

Music Guide & Encyclopedia ships an update every 3 weeks, COBIT Design & Implement Prep every 6 weeks. The most recent releases landed on October 7, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Music Guide & Encyclopedia | COBIT Design & Implement Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (7 ratings)](https://appshunter.io/ios/app/music-guide-and-encyclopedia/id1122036466/reviews)** | — |
| Number of ratings | **7** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 99 MB | 27 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Good Spider, LLC](https://appshunter.io/developer/1487595667) | [Davy Raitt](https://appshunter.io/developer/1795318281) |

## What reviewers say

### Music Guide & Encyclopedia

[App page](https://appshunter.io/ios/app/music-guide-and-encyclopedia/id1122036466)

Discover the world's musical instruments through thousands of articles and high-definition photos. This comprehensive guide is perfect for all ages, offering engaging content and offline access. Earn badges as you learn about music and instruments from A-Z.

**Highlights:** Thousands of articles and HD photos, Covers instruments from A-Z, Engaging and easy-to-understand content, Offline access, Badge collection for motivation, Stunning UI for iPhone and iPad

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $2.99 | one-time |


### COBIT Design & Implement Prep

[App page](https://appshunter.io/ios/app/cobit-design-and-implement-prep/id6757922721)

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

**In-app purchases:** none


## Frequently asked questions

### Is Music Guide & Encyclopedia free?

Music Guide & Encyclopedia is free to download, with in-app purchases available.

### Is COBIT Design & Implement Prep free?

COBIT Design & Implement Prep is free to download, with no in-app purchases.

### Do Music Guide & Encyclopedia or COBIT Design & Implement Prep have ads?

Neither Music Guide & Encyclopedia nor COBIT Design & Implement Prep shows ads.

### Which is updated more often, Music Guide & Encyclopedia or COBIT Design & Implement Prep?

Music Guide & Encyclopedia ships an update every 3 weeks, and COBIT Design & Implement Prep every 6 weeks. Most recently, Music Guide & Encyclopedia was updated on October 7, 2026 and COBIT Design & Implement Prep on October 18, 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.*