# Theory Lessons vs Sing Scales

The clearest difference is rating: Sing Scales at 5.0 against Theory Lessons's 4.4. Sing Scales also leads on review sentiment (100% vs 83%). Theory Lessons's advantage is ratings volume (127 vs 1) and price ($2.99 vs $5.99). On ads, in-app purchases and iOS requirement there is nothing between them.

Theory Lessons costs $2.99 and Sing Scales $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Sing Scales holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Theory Lessons has 127 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 83% of Theory Lessons's written reviews are positive against 100% of Sing Scales's.

Theory Lessons ships an update every 4 months, Sing Scales every 9 months. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Theory Lessons | Sing Scales |
| --- | --- | --- |
| Price | **$2.99** | $5.99 |
| Rating | [4.4 (127 ratings)](https://appshunter.io/ios/app/theory-lessons/id493157418/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sing-scales/id6455374649/reviews)** |
| Number of ratings | **127** | 1 |
| Positive reviews | 83.1% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 9 months |
| Monetization | **Free** | Paid |
| Best chart rank | **#13** | — |
| Size | 4 MB | 5 MB |
| Requires iOS | **15.8** | 16.1 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [musictheory.net](https://appshunter.io/developer/459313479) | [SEQFX PTY LTD](https://appshunter.io/developer/1092841331) |

## What reviewers say

### Theory Lessons

[App page](https://appshunter.io/ios/app/theory-lessons/id493157418)

**Currently charting:** #13 Top Paid · Music, #75 Top Paid (US App Store)

Explore 39 animated music theory lessons covering fundamental concepts like scales, chords, and intervals. Deepen your understanding of musical structure and analysis with this comprehensive resource.

**Highlights:** 39 animated music theory lessons, Covers staff, clefs, and ledger lines, Explains note and rest duration, Details major and minor scales, Teaches intervals and chord inversions, Includes Roman numeral analysis, Features musical analysis examples

**In-app purchases:** none

**What reviewers like**

- 🚀 Efficient and easy to use
- 👍 Clear and concise explanations
- 💡 Helpful visual aids and animations
- 🤩 Excellent learning tool for beginners
- 🔍 Comprehensive coverage of music theory

**What reviewers complain about**

- 🐛 Audio issues on some devices
- 🔍 Limited content compared to website
- 🤔 Keyboard-centric approach may not suit non-pianists
- 💰 Paid app when website is free

**Reported bugs**

- Directional arrows and guidance symbols not working on iPad
- Text panels cut off at the bottom and unable to be resized

**Requested features**

- Add more advanced theory topics
- Incorporate practice exercises and quizzes
- Include support for other instruments beyond piano
- Integrate with the Tenuto app for a more complete experience


### Sing Scales

[App page](https://appshunter.io/ios/app/sing-scales/id6455374649)

Practice singing musical scales with a comprehensive library and interactive piano. Designed for beginners, it helps develop vocal control, ear training, and confidence. Master pitch and vocal flexibility through experimentation.

**Highlights:** Extensive scale library (100+ scales), Configurable tempo and stepping patterns, Interactive piano keyboard, Designed for non-musicians, Solfège syllable practice, Ear training development

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

**In-app purchases:** none


## Frequently asked questions

### Is Theory Lessons free?

Theory Lessons costs $2.99, with no in-app purchases.

### Is Sing Scales free?

Sing Scales costs $5.99, with no in-app purchases.

### Which has better reviews, Theory Lessons or Sing Scales?

Sing Scales is rated higher. Theory Lessons averages 4.4 out of 5 from 127 ratings, while Sing Scales averages 5.0 from 1 ratings.

### Do Theory Lessons or Sing Scales have ads?

Neither Theory Lessons nor Sing Scales shows ads.

### Which is updated more often, Theory Lessons or Sing Scales?

Theory Lessons ships an update every 4 months, and Sing Scales every 9 months. Most recently, Theory Lessons was updated on November 6, 2026 and Sing Scales on November 7, 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.*