# Note Trainer Pro vs Chordio

The clearest difference is price: Chordio at Free against Note Trainer Pro's $3.99. Chordio also leads on update cadence (every 8 days vs every 4 months). Note Trainer Pro's advantage is in-app purchases (none vs 19) and rating (4.8 vs 4.4). On ads and device support there is nothing between them.

Chordio is free to download; Note Trainer Pro costs $3.99 up front. Chordio sells 19 one-off in-app purchases. Note Trainer Pro asks for nothing beyond the download.

Note Trainer Pro holds the better App Store score, 4.8 against 4.4. That said, the two scores are not equally well evidenced: Note Trainer Pro has 917 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 88% of Note Trainer Pro's written reviews are positive against 62% of Chordio's.

Note Trainer Pro ships an update every 4 months, Chordio every 8 days. The most recent releases landed on October 16, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Note Trainer Pro | Chordio |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[4.8 (917 ratings)](https://appshunter.io/ios/app/note-trainer-pro/id505179836/reviews)** | [4.4 (8 ratings)](https://appshunter.io/ios/app/chordio-compose-and-learn-music/id1580214821/reviews) |
| Number of ratings | **917** | 8 |
| Positive reviews | **88.2% of reviews** | 61.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 8 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 33 MB | 202 MB |
| Requires iOS | **12.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [thoor software AB](https://appshunter.io/developer/698240746) | [One In A Billion Ltd](https://appshunter.io/developer/479881389) |

## What reviewers say

### Note Trainer Pro

[App page](https://appshunter.io/ios/app/note-trainer-pro/id505179836)

This app helps users improve their music reading skills through interactive exercises. It offers a range of difficulty levels, tracks progress, and supports various musical notations and input methods.

**Highlights:** Note and chord exercises, Customizable difficulty levels, Multiple notation systems, Transposing instrument support, Treble, Bass, Alto, Tenor clefs, MIDI and virtual piano input, Progress statistics

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

**In-app purchases:** none

**What reviewers like**

- 👍 Perfect for learning notes and chords
- 🚀 Excellent tool for improving sight reading skills
- 💡 Great for beginners and experienced players
- 👍 Intuitive and easy to use interface
- 👍 Customizable exercises and settings

**What reviewers complain about**

- 🐛 Occasional crashes and bugs
- 🔍 Limited note/chord range in some exercises
- 🔍 Overly sensitive to note duration
- 🔍 Lack of timer/progress tracking features

**Reported bugs**

- Crashes when playing certain notes/chords
- MIDI connectivity issues on some devices
- Note recognition errors in certain exercises

**Requested features**

- Add more advanced exercises like chord progressions and modulations
- Include a timer and progress tracking system
- Expand the note/chord range to cover the full piano keyboard
- Allow customization of exercise difficulty and note/chord selection


### Chordio

[App page](https://appshunter.io/ios/app/chordio-compose-and-learn-music/id1580214821)

This app is a music composition and theory tool that helps musicians explore chords and scales interactively. It offers features for creating, storing, and rearranging chord progressions, along with integrated music theory lessons and practice tools. It's designed to spark creativity and enhance music learning for producers, composers, and educators.

**Highlights:** Chord progression generator, Custom chord creation and editing, Real-time MIDI input visualization, Scales and modes practice, Music theory lessons and quizzes, Sheet music practice tools, Chord Suggestion AI

**Features:** Vision Pro support

**In-app purchases (19)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Free Chord Pack | Free | one-time |
| Gymnopedie No.1 | $1.99 | one-time |
| Arabesque No.1 | $1.99 | one-time |
| Gnossienne No.1 | $1.99 | one-time |
| Chord Progressions 251 No.1 | $2.99 | one-time |
| Jazz Progressions 01 | $5.99 | one-time |
| Neo-Soul Progressions 01 | $5.99 | one-time |
| Neo-Soul Tunes 01 | $5.99 | one-time |
| RnB Chords No.1 | $5.99 | one-time |
| Classical Progressions 1 | $5.99 | one-time |
| II-V-I Progression | $5.99 | one-time |
| RnB Progressions 01 | $5.99 | one-time |
| Beginner Essentials | $6.99 | one-time |
| RnB Progressions, Vol. 1 | $7.99 | one-time |
| II-V-I Jazz Progressions | $9.99 | one-time |
| Jazz Progression, Vol. 1 | $9.99 | one-time |
| Jazz Lick Exercises, Vol. 1 | $9.99 | one-time |
| Classical Collection, Vol. 1 | $14.99 | one-time |
| Unlock App | $14.99 | one-time |


## Frequently asked questions

### Is Note Trainer Pro free?

Note Trainer Pro costs $3.99, with no in-app purchases.

### Is Chordio free?

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

### Which has better reviews, Note Trainer Pro or Chordio?

Note Trainer Pro is rated higher. Note Trainer Pro averages 4.8 out of 5 from 917 ratings, while Chordio averages 4.4 from 8 ratings.

### Do Note Trainer Pro or Chordio have ads?

Neither Note Trainer Pro nor Chordio shows ads.

### Which is updated more often, Note Trainer Pro or Chordio?

Note Trainer Pro ships an update every 4 months, and Chordio every 8 days. Most recently, Note Trainer Pro was updated on October 16, 2026 and Chordio on October 9, 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.*