# TB Spectrogram vs Pure Tuner

The clearest difference is in-app purchases: TB Spectrogram at none against Pure Tuner's 1. TB Spectrogram also leads on iOS requirement (13.0 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Pure Tuner sells 1 one-off in-app purchase. TB Spectrogram asks for nothing beyond the download.

TB Spectrogram ships an update every 3 weeks, Pure Tuner fortnightly. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | TB Spectrogram | Pure Tuner |
| --- | --- | --- |
| 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** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | Paid | — |
| Size | 15 MB | 2 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ToneBoosters](https://appshunter.io/developer/1472446500) | [Christian-Conrad Knorr](https://appshunter.io/developer/1882745277) |

## 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


### Pure Tuner

[App page](https://appshunter.io/ios/app/pure-tuner-temperaments/id6814490061)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Every Tuning | $3.99 | one-time |


## Frequently asked questions

### Is TB Spectrogram free?

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

### Is Pure Tuner free?

Pure Tuner is free to download, with in-app purchases available.

### Do TB Spectrogram or Pure Tuner have ads?

Neither TB Spectrogram nor Pure Tuner shows ads.

### Which is updated more often, TB Spectrogram or Pure Tuner?

TB Spectrogram ships an update every 3 weeks, and Pure Tuner fortnightly. Most recently, TB Spectrogram was updated on October 22, 2026 and Pure Tuner on October 24, 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.*