# Note Pro! vs In Theory

The clearest difference is rating: In Theory at 5.0 against Note Pro!'s 4.5. In Theory also leads on in-app purchases (none vs 10) and review sentiment (100% vs 66%). Note Pro!'s advantage is price ($0.99 vs $4.99) and iOS requirement (8.0 vs 13.0). On ratings volume, ads, monetization model and device support there is nothing between them.

Note Pro! costs $0.99 and In Theory $4.99 up front. Note Pro! sells 10 one-off in-app purchases. In Theory asks for nothing beyond the download.

In Theory holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 4 respectively. Written reviews point the same way: 66% of Note Pro!'s written reviews are positive against 100% of In Theory's.

Note Pro! ships an update every 2 months, In Theory weekly. The most recent releases landed on October 23, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Note Pro! | In Theory |
| --- | --- | --- |
| Price | **$0.99** | $4.99 |
| Rating | [4.5 (2 ratings)](https://appshunter.io/ios/app/note-pro/id583059995/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/in-theory-interval-keyboard/id1667984658/reviews)** |
| Number of ratings | 2 | **4** |
| Positive reviews | 66.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Paid | Paid |
| Size | 9 MB | 7 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [barnsystem GmbH](https://appshunter.io/developer/583059998) | [Cem Olcay](https://appshunter.io/developer/523633853) |

## What reviewers say

### Note Pro!

[App page](https://appshunter.io/ios/app/note-pro/id583059995)

Learn to play musical notes for your instrument with interactive exercises. Master sight-reading, chords, and rhythm through a game-like interface designed for effective brain integration. Practice anytime, anywhere.

**Highlights:** Instrument-specific exercises, Authentic instrument sounds, Interactive note presentation and repetition, Game-like learning interface, Intuitive operation, Supports piano, violin, saxophone, flute, guitar

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Piano for childs | $0.99 | one-time |
| Flute | $0.99 | one-time |
| Electric guitar | $1.99 | one-time |
| Recorder | $1.99 | one-time |
| Saxophone | $1.99 | one-time |
| Violin | $2.99 | one-time |
| clefs | $2.99 | one-time |
| Piano for adults | $2.99 | one-time |
| Allrounder | $2.99 | one-time |
| Allrounder violin | $3.99 | one-time |


### In Theory

[App page](https://appshunter.io/ios/app/in-theory-interval-keyboard/id1667984658)

This app provides a unique interval-based MIDI keyboard with over 110 scales. It allows for flexible chord creation by toggling additional intervals and notes from different octaves. It integrates with external MIDI keyboards and sequencers for advanced music production.

**Highlights:** Interval-based MIDI keyboard, Over 110 built-in scales, Customizable chord voicing, MIDI keyboard input support, MIDI CC message control, AUv3 plugin compatibility, Visual scale and note display

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

**In-app purchases:** none


## Frequently asked questions

### Is Note Pro! free?

Note Pro! costs $0.99, and also offers in-app purchases.

### Is In Theory free?

In Theory costs $4.99, with no in-app purchases.

### Which has better reviews, Note Pro! or In Theory?

In Theory is rated higher. Note Pro! averages 4.5 out of 5 from 2 ratings, while In Theory averages 5.0 from 4 ratings.

### Do Note Pro! or In Theory have ads?

Neither Note Pro! nor In Theory shows ads.

### Which is updated more often, Note Pro! or In Theory?

Note Pro! ships an update every 2 months, and In Theory weekly. Most recently, Note Pro! was updated on October 23, 2026 and In Theory on October 15, 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.*