# SUS4 Scale Lab: Guitar Scales — Modes on fretboard, piano

> Modes on fretboard, piano (iPhone/iPad app by ThePaulSmith.)

- Source: https://appshunter.io/ios/app/sus4-scale-lab-guitar-scales/id6777229932 (this page in markdown: same URL + `.md`)
- Developer: [ThePaulSmith](https://appshunter.io/developer/319584506)
- Category: Music, Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.0 · 20 MB
- Languages: American English
- Released: 2026-06-16
- Data updated: 2026-10-04

## What is SUS4 Scale Lab?

Every common scale and mode, on guitar and piano.
Guitar scales and modes shown on a fretboard and on a piano keyboard.
104 scales across 15 categories, each playable so you hear it as well as see it.

Scale Lab is the reference you keep open during practice when you are learning a new mode, checking what notes belong to a harmonic minor in B, or visualising a Dorian scale across the guitar neck. It covers every standard scale and mode — 104 entries across 15 categories — displayed on guitar fretboard and piano keyboard.

Switch root notes and scale types instantly. Scale positions light up across the neck. The app does not lecture; it shows you the information and gets out of the way.

• Every common scale and mode: major, minor, pentatonic, modal, and more
• Guitar fretboard view with scale positions across the neck
• Piano keyboard view with scale notes highlighted
• Switch root note and scale type instantly
• Unlock: the full 104-scale catalog, Theory cards, Mode Comparison, Practice Loop

No account. No mic. Runs fully on-device. Free to explore — monthly subscription or one-time unlock for the full catalog.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| SUS4 Scale Lab Pro Monthly | $0.99 | per month |
| SUS4 All-Access | $4.99 | per month |


## Is SUS4 Scale Lab safe?

Not enough ratings yet to assess SUS4 Scale Lab.

## Is SUS4 Scale Lab legit?

SUS4 Scale Lab: Guitar Scales appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for SUS4 Scale Lab is 75 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.1.2 — 2026-09-29

Lifetime purchase option and reliability improvements.

### 1.1.1 — 2026-08-27

Lifetime purchase option and reliability improvements.

### 1.1.0 — 2026-07-02

Every advertised feature is now fully functional, Pro genuinely unlocks real features, and the new SUS4 All-Access pass unlocks all 24 SUS4 apps with a 7-day free trial. Faster and clearer throughout.

### 1.0.2 — 2026-06-22

Reliability and performance improvements throughout the app.

### 1.0 — 2026-06-16

No release notes.

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## More apps by ThePaulSmith

- [iScrobble Pick And Mix](https://appshunter.io/ios/app/iscrobble-pick-and-mix/id319584503)
- [iSwipeMusic](https://appshunter.io/ios/app/iswipemusic/id334689181)
- [iShuffleAlbums](https://appshunter.io/ios/app/ishufflealbums/id335009718)
- [iBreathalyzer](https://appshunter.io/ios/app/ibreathalyzer/id369686249)
- [SUS4 Pitch Pipe: Starting Note](https://appshunter.io/ios/app/sus4-pitch-pipe-starting-note/id6777229584)
- [SUS4 Chord ID](https://appshunter.io/ios/app/sus4-chord-id/id6777229621)

All apps by ThePaulSmith: https://appshunter.io/developer/319584506

## Related topics

[lark scale](https://appshunter.io/ios/topics/lark-scale)

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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 2026-10-04.*