# TB Spectrogram vs Book Whisperer

The clearest difference is update cadence: Book Whisperer at weekly against TB Spectrogram's every 3 weeks. TB Spectrogram's advantage is iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

TB Spectrogram ships an update every 3 weeks, Book Whisperer weekly. The most recent releases landed on November 3, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | TB Spectrogram | Book Whisperer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (50 ratings)](https://appshunter.io/ios/app/tb-spectrogram/id1530170842/reviews)** | — |
| Number of ratings | **50** | — |
| Positive reviews | 71.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Paid | — |
| Size | 15 MB | 3 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ToneBoosters](https://appshunter.io/developer/1472446500) | [Konrad Leszczyski](https://appshunter.io/developer/1736949824) |

## What reviewers say

### TB Spectrogram

[App page](https://appshunter.io/ios/app/tb-spectrogram/id1530170842)

This app provides real-time audio analysis with a spectrogram, spectrum analyzer, and goniometer. It can be used as a standalone application or as an AUv3 plugin within compatible music production hosts. Visualize your audio in detail with adjustable settings and multiple display options.

**Highlights:** Real-time spectrogram and spectrum analysis, Goniometer for stereo signal analysis, AUv3 plugin compatibility, Adjustable frequency and time resolution, Customizable color themes, On-screen piano keyboard mapping

**Features:** Vision Pro support

**In-app purchases:** none


### Book Whisperer

[App page](https://appshunter.io/ios/app/book-whisperer/id6752223772)

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

**In-app purchases:** none


## Frequently asked questions

### Is TB Spectrogram free?

TB Spectrogram is free to download, with no in-app purchases.

### Is Book Whisperer free?

Book Whisperer is free to download, with no in-app purchases.

### Do TB Spectrogram or Book Whisperer have ads?

Neither TB Spectrogram nor Book Whisperer shows ads.

### Which is updated more often, TB Spectrogram or Book Whisperer?

TB Spectrogram ships an update every 3 weeks, and Book Whisperer weekly. Most recently, TB Spectrogram was updated on November 3, 2026 and Book Whisperer on October 28, 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.*