# Tracebook - Speaker Reference — Actionable Field Data

> Actionable Field Data (iPhone/iPad app by Marcus Painter.)

- Source: https://appshunter.io/ios/app/tracebook-speaker-reference/id6474818065 (this page in markdown: same URL + `.md`)
- Developer: [Marcus Painter](https://appshunter.io/developer/998530071)
- Category: Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 16.6 · 3 MB
- Languages: English
- Released: 2024-01-21
- Data updated: 2026-05-19
- User reviews in markdown: https://appshunter.io/ios/app/tracebook-speaker-reference/id6474818065/reviews.md

## What is Tracebook?

Tracebook is an independent public non-profit community that promotes the open exchange of loudspeaker system reference data measured by audio professionals for audio professionals. The app is an iOS version of the Tracebook website found at https://trace-book.org.

The reference data includes: 

• Magnitude
• Phase
• Coherence
• Measurement details


## Version history (last 4 releases)

### 2.0.3 — 2024-11-27

- Bug fixes

### 2.0.2 — 2024-11-10

- Usage Analytics

### 1.1 — 2024-02-12

• Pull to refresh new measurements
• Link to the measurement on Tracebook website (requires login)
• Comment text
• Setup Photo
• Graph scale range changed to -30dB to 30dB
• Bug fixes

### 1.0 — 2024-01-21

No release notes.

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## More apps by Marcus Painter

- [Speed of Sound](https://appshunter.io/ios/app/speed-of-sound/id6476942150)
- [SpeedAir - Speed of Sound](https://appshunter.io/ios/app/speedair-speed-of-sound/id6480329550)

All apps by Marcus Painter: https://appshunter.io/developer/998530071

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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 2026-05-19.*