# Solo - Fretboard Visualization — Guitar Fretboard Trainer

> Guitar fretboard visualization and practice trainer for notes, intervals, chords, and scales. (iPhone/iPad app by Trio Software Ltd.)

- Source: https://appshunter.io/ios/app/solo-fretboard-visualization/id1537057699 (this page in markdown: same URL + `.md`)
- Developer: [Trio Software Ltd](https://appshunter.io/developer/1537057701)
- Category: Music, Education
- Price: $17.99 with in-app purchases
- Rating: 4.80/5 from 630 App Store ratings · 229 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 231 MB
- Languages: American English
- Released: 2021-01-01
- Data updated: 2026-09-01
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/solo-fretboard-visualization/id1537057699/reviews.md

## What is Solo?

Solo is the ultimate practice App for mastering fretboard visualization, designed by world renowned guitarists Tom Quayle and David Beebee.

Four powerful fretboard trainers allow you to work intuitively on each aspect of the visualization process; learning note names, memorising interval shapes, outlining chord changes, and practicing scales.

Solo asks you to find intervallic functions against one root note, chord symbol or scale at a time, listens to the notes you play, and doesn’t move on until you’ve correctly found each note by its intervallic function in the specified order.

Practice with Solo and finally learn your note names, master interval shapes, confidently play through chord changes and break out of scale boxes with intervallic functions. Start transforming your playing and confidence on the fretboard today!


NOTE TRAINER
The Note Trainer is perfect for beginner and intermediate players getting to grips with note names on the neck - the foundation of solid fretboard knowledge. 

‣ Solo shows you random root notes to find and listens, waiting for you to get it correct.
‣ Slide on the interactive fretboards for helpful diagrams and to study alternative options. Choose from 6 string guitar (standard and 4ths tuning), 7 string guitar, 4 string bass & 5 string bass.
‣ Optional practice suggestions offer challenging ways to limit and test yourself.
‣ Duration based workouts allow you to craft the perfect practice session.


INTERVAL TRAINER
The Interval Trainer will help players at all levels work on interval shapes with intervallic functions - the key to unlocking true freedom on the fretboard.

‣ Choose any combination of intervallic functions to practice.
‣ Create custom interval groups or choose the intervals for ANY chord type or scale.
‣ The Interval Trainer will randomise your chosen intervals and ask you to find them against either a fixed or random root note.
‣ Slide on the interactive fretboards for helpful diagrams, showing you where all of the interval shapes are across the neck, and to study alternative options. Choose from 6 string guitar (standard and 4ths tuning), 7 string guitar, 4 string bass & 5 string bass.
‣ Duration based workouts allow you to craft the perfect practice session.


CHANGES TRAINER
In the Changes Trainer you find intervallic functions, using single notes to outline different chord types or sets of chord changes, a key skill for learning to improvise through chord changes.  

‣ Practice outlining intervallic functions through over 100 common chord progressions and single chord exercises.
‣ 50 intervallic function levels. Go from simple chord tones to complex melodic structures and scales. 
‣ Solo intelligently maps out the correct intervals over each chord and listens for you to play each intervallic function in the specified order.
‣ Powerful workout options provide almost limitless ways to challenge yourself.
‣ Transpose the key of any progression or exercise. 
‣ Choose to randomly transpose the progression (or single chord exercise) each time it repeats.
‣ Work on voice leading chord tones through single note lines.


SCALE TRAINER
The Scale Trainer contains a vast array of scales and powerful workout options, allowing you to finally break out of the box and develop a much deeper understanding of how scales are constructed on the fretboard.

‣ Practice finding scales on the fretboard using intervallic functions. 
‣ Over 50+ Scales and modes.
‣ Powerful workout options provide almost limitless ways to challenge yourself.
‣ Melodic sequence options let you focus on starting from any chord tone within the scale.
‣ Duration based workouts allow you to craft the perfect practice session.

## Key features

- Fretboard visualization
- Note name trainer
- Interval shape memorization
- Chord change outlining
- Scale practice
- Interactive fretboards
- Customizable workouts

## Pricing and in-app purchases

Base price: $17.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Custom Tunings | $1.99 | one-time |
| Custom Chord Progressions | $5.99 | one-time |


## Chart rankings

- #92 in Top Paid · Music (US App Store)

## What do users think of Solo?

Overall sentiment: positive

**Pros**

- 🚀 Excellent practice tool
- 👍 Helps improve fretboard knowledge
- 👍 Versatile and configurable
- 👍 Detailed video tutorials
- 👍 Accurate note detection
- 👍 Valuable for intermediate/advanced players
- 👍 Affordable price

**Cons**

- 🐛 Note detection issues
- 🐛 App crashes
- 🐛 Lack of customization options
- 🐛 Unintuitive for beginners
- 🐛 Limited functionality for the price

**Commonly reported bugs**

- Crashes when launching the app
- Inconsistent note detection
- Inability to save progress or settings

**Most requested features**

- Add ability to create custom chord progressions
- Integrate metronome functionality
- Provide visual representation of intervals on staff
- Add option to practice natural notes only
- Implement option to hear chord tones in the background
- Allow randomization of scale order
- Add support for non-standard tunings
- Implement sound feedback when finding the correct note

## Recent user reviews (10 of 229)

All indexed reviews: https://appshunter.io/ios/app/solo-fretboard-visualization/id1537057699/reviews.md

### 5/5 — My opinion

*2026-08-01, version 2.5.2*

Solo is a great tool if you use it consistently.

### 5/5 — Game Changer

*2026-07-27, version 2.5.2*

This app should be part of every guitarist's practice routine. Period!

It tackles so many areas that most musicians know they're missing, but often can't put into words. I'd had my eye on it for a while but kept putting off buying it, thinking that learning more fretboard shapes and theory concepts would  take my playing to the next level. Those things absolutely help, but they can only take you so far.

After finally taking the plunge and spending just one evening with it, it's completely changed how I think about my practice sessions. It's already given me so many new ideas and highlighted areas I'd been overlooking.

Fair play, Tom—and thank you. I genuinely think every guitarist should have this at their disposal, especially when they're starting to learn intervals and connect the fretboard in a meaningful way. You’ve hit the nail on the head with this one.

### 5/5 — If you are serious about guitar, you need this app

*2026-07-09, version 2.5.1*

I use Solo every day. I run just 10 minutes of fretboard drills and 10 minutes of interval training over various scales. You can use it with a metronome to gauge your speed and improvement. Thank you for creating such no nonsense application for people who are serious about learning to play the guitar.

### 5/5 — eclipes art studio

*2026-07-01, version 2.5.1*

love these guys the app is genius

### 5/5 — 希望有汉化中文版本的

*2026-05-11*

建议演奏后自动下一个考题，不需要点鼠标切换

### 5/5 — Essential for serious guitarists

*2026-05-06, version 2.4.1*

Essential for interval visualization, can’t wait for what they’re gonna bring to this app in future updates.

### 5/5 — About the app

*2026-05-05*

It’s really very very helpful full to visualise the fretboard, it will enhance the experience to understand fret in to a different dimension… it’s awesome… love to practice guitar with this application… I m also big fan of Tom Quayle…

### 5/5 — Très utile

*2026-05-04*

Une super application pédagogique et le meilleur moyen pour tout travailler

### 4/5 — Would love sheet music training for note names

*2026-05-03, version 2.4.1*

Hi! I love the app, its a great way to memorize the note names. I have one ask for the app: can you include sheet music notation for the note trainer? I am trying to learn how to read so it would be helpful. Even for people who don't care to read, an option to add an octave marker (E3 vs E4) would be helpful, since that can help you figure out which E's are the same and which are different, for example. I think having a note marked on sheet music is the best option as it is very visual, but let me know what you think! Really like the app otherwise, let me know what you think

### 5/5 — Super application

*2026-04-02*

Super application pour apprendre les gamme les modes…etc  comprendre l’harmonie

## Frequently asked questions about Solo

### What does Solo - Fretboard Visualization do?

Solo is a practice app designed to help guitarists and bassists master fretboard visualization. It offers four distinct trainers: Note Trainer, Interval Trainer, Changes Trainer, and Scales Trainer, to improve your understanding of note names, intervals, chord changes, and scales.

### What are the key features of this app?

Key features include interactive fretboards for various instruments (6-string guitar, 7-string guitar, 4-string bass, 5-string bass) with different tuning options. It offers note trainers, interval trainers, chord change trainers, and scale practice modules with customizable workouts and duration-based sessions.

### How much does Solo - Fretboard Visualization cost?

The app is free to download and use with in-app purchases. This means you can access basic functionalities for free, with options to purchase additional features or content.

### What instruments and tunings are supported?

The app supports 6-string guitar in standard and 4ths tuning, 7-string guitar, 4-string bass, and 5-string bass. This wide range of instrument and tuning support makes it versatile for many musicians.

### Who is this app designed for?

This app is designed for guitar and bass players of all skill levels, from beginners to advanced musicians. It's particularly beneficial for those looking to improve their fretboard visualization, learn note names, master intervals, understand chord changes, and break out of scale boxes.

## Version history (last 5 releases)

### 2.5.2 — 2026-07-10

Extended the Custom Tunings in-app purchase to handle a wider range of tunings.

### 2.5.1 — 2026-06-11

Trio News improvements: reliable new-post notifications, better-looking video posts, and quick access to Help and Settings from the News tab.

### 2.5.0 — 2026-06-06

- Added a new Trio News section, learn more about everything we're working on, new helpful videos, and live streams.

### 2.4.1 — 2026-04-28

Added Up & Down option to Scale Trainer

### 2.4.0 — 2026-03-16

- Add new custom tunings option for creating your own stringed instruments that you might tune a little differently and control how they work with Solo.
- Added rotation on focus screens when in the trainers
- Added horizontal fretboard when in landscape (toggle in settings on iPad)

## Apps similar to Solo

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Guitar Chord Finder : Fabulus](https://appshunter.io/ios/app/guitar-chord-finder-fabulus/id1559087405) | 4.5 (70) | Free | Music |
| [Guitar Scales & Chords Power](https://appshunter.io/ios/app/guitar-scales-and-chords-power/id647000751) | 4.8 (92) | $5.99 | Music |
| [Guitar Gravitas: Chords Scales](https://appshunter.io/ios/app/guitar-gravitas-chords-scales/id1171417699) | 4.8 (3,924) | Free | Music |
| [ChordBank: Learn Guitar Chords](https://appshunter.io/ios/app/chordbank-learn-guitar-chords/id397602509) | 4.7 (6,277) | Free | Music |
| [Ultimate Guitar: Chords & Tabs](https://appshunter.io/ios/app/ultimate-guitar-chords-and-tabs/id357828853) | 4.7 (473,707) | Free | Music |
| [International Guitar Chords](https://appshunter.io/ios/app/international-guitar-chords/id419001760) | 4.1 (16) | $3.99 | Music |

## More apps by Trio Software Ltd

- [Resolve: Reactive Ear Training](https://appshunter.io/ios/app/resolve-reactive-ear-training/id6737443921)

All apps by Trio Software Ltd: https://appshunter.io/developer/1537057701

## Related topics

[solo guitar](https://appshunter.io/ios/topics/solo-guitar) · [neckpilot fretboard studio](https://appshunter.io/ios/topics/neckpilot-fretboard-studio) · [essential guitar note trainer](https://appshunter.io/ios/topics/essential-guitar-note-trainer)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-01.*