# Music Theory 101 vs OneBigNext

The clearest difference is update cadence: Music Theory 101 at every 5 days against OneBigNext's every 10 days. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Music Theory 101 ships an update every 5 days, OneBigNext every 10 days. The most recent releases landed on October 22, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Music Theory 101 | OneBigNext |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (70 ratings)](https://appshunter.io/ios/app/music-theory-101-study-course/id1629995579/reviews)** | — |
| Number of ratings | **70** | — |
| Positive reviews | 82.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 10 days |
| Monetization | Free | — |
| Size | 78 MB | 46 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Poesie Inc](https://appshunter.io/developer/1505664474) | [OneBigNext Ltd](https://appshunter.io/developer/1861515687) |

## What reviewers say

### Music Theory 101

[App page](https://appshunter.io/ios/app/music-theory-101-study-course/id1629995579)

An interactive music theory training app covering classical fundamentals. It features 19 units with audio, exercises, and definitions, mirroring AP Music Theory exam curriculum. Practice skills with over 90 exercise types.

**Highlights:** Interactive music theory course, 19 comprehensive units, Audio samples and key definitions, Skill practice exercises, AP Music Theory exam curriculum, Over 90 exercise types, Aural recognition and dictation

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

**In-app purchases:** none


### OneBigNext

[App page](https://appshunter.io/ios/app/onebignext/id6756577819)

**In-app purchases:** none


## Frequently asked questions

### Is Music Theory 101 free?

Music Theory 101 is free to download, with no in-app purchases.

### Is OneBigNext free?

OneBigNext is free to download, with no in-app purchases.

### Do Music Theory 101 or OneBigNext have ads?

Neither Music Theory 101 nor OneBigNext shows ads.

### Which is updated more often, Music Theory 101 or OneBigNext?

Music Theory 101 ships an update every 5 days, and OneBigNext every 10 days. Most recently, Music Theory 101 was updated on October 22, 2026 and OneBigNext on October 16, 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.*