# ARN B4 3-4 — For the 4-string bass

> For the 4-string bass (iPhone/iPad app by Nicolas Augsburger Rossi.)

- Source: https://appshunter.io/ios/app/arn-b4-3-4/id6744577173 (this page in markdown: same URL + `.md`)
- Developer: [Nicolas Augsburger Rossi](https://appshunter.io/developer/1803162820)
- Category: Music, Education
- Price: $22.99
- Age rating: 4+
- Requires: iOS 17.6 · 4 MB
- Languages: Australian English, Arabic, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French (France), Swiss High German and 25 more
- Released: 2025-04-18
- Data updated: 2026-08-24
- User reviews in markdown: https://appshunter.io/ios/app/arn-b4-3-4/id6744577173/reviews.md

## What is ARN B4 3?

ARN B4 3-4 for 4-string bass shows you triads and tetrads of any musical scale in an innovative way. Perfect for studying and applying chords and harmonizations.
- You can move the tonic anywhere on the fretboard
- Thanks to the dedicated Circle of Fifths for each scale, you can easily create harmonious chord progressions
- Choose between four neck positions (2 for right-handed and 2 for left-handed players)
- Use FOCUS to zoom in on a specific part of the fretboard
- Want to experiment? Change the tuning and instantly get the correct scale degrees for the scale you're interested in, with over 10 preset tunings
- Perfect for composers, self-taught musicians, students, and teachers
- Over 160 recorded scales
- Save your sessions with your notes, export and import them between your devices, and share the files with your friends or students
- The super useful app for your fretboard: Degrees or Notes, switch modes whenever you want!
- Click on " i " to download free sessions from the website


## Version history (last 5 releases)

### 3.2.9 — 2026-08-18

Minor improvements

### 3.2.8 — 2026-08-03

Minor improvements

### 3.2.7 — 2026-06-21

Minor improvements

### 3.2.4 — 2026-06-07

New secondary selection mode: Unique Selection
In the Secondary Selections view, a new control next to the stepper lets you choose between two selection modes:
- Unique (single degree): selects a degree at a specific fret — ideal for precise fingerings and exact voicings
- Multi-octave (two degrees): automatically selects all occurrences of a degree across the string, as in the previous version
The selected mode is saved with the session and handled correctly when transposing (stepper) or changing tuning.

### 3.1.18 — 2026-03-06

Minor improvements

## More apps by Nicolas Augsburger Rossi

- [ARN-Music 3-4](https://appshunter.io/ios/app/arn-music-3-4/id6743497768)
- [ARN G6 3-4](https://appshunter.io/ios/app/arn-g6-3-4/id6743498770)
- [ARN-Music 3](https://appshunter.io/ios/app/arn-music-3/id6743633914)
- [ARN B5 3-4](https://appshunter.io/ios/app/arn-b5-3-4/id6744575536)
- [CL-1](https://appshunter.io/ios/app/cl-1/id6767980060)

All apps by Nicolas Augsburger Rossi: https://appshunter.io/developer/1803162820

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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 2026-08-24.*