# Pitch Witch vs Sensor Technology Engineering

The clearest difference is update cadence: Pitch Witch at every 9 days against Sensor Technology Engineering's every 7 months. 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.

Pitch Witch ships an update every 9 days, Sensor Technology Engineering every 7 months. The most recent releases landed on July 5, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Pitch Witch | Sensor Technology Engineering |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/pitch-witch/id1590015267/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 7 months |
| Monetization | Free | — |
| Size | 6 MB | 94 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Privacy Research LLC](https://appshunter.io/developer/1530390623) | [Sensor Technology Engineering](https://appshunter.io/developer/1668239053) |

## What reviewers say

### Pitch Witch

[App page](https://appshunter.io/ios/app/pitch-witch/id1590015267)

This free, open-source app helps users train their speaking voice by monitoring pitch and resonance in real-time. It offers advanced features like multiple pitch estimation algorithms and customizable visual guides for pitch range. Users can save, analyze, and export recordings for later review.

**Highlights:** Live voice pitch monitoring, Multiple pitch estimation algorithms, Formant estimation for resonance analysis, Customizable visual pitch guidelines, Save, analyze, and export recordings, Pinch-to-zoom pitch chart

**Features:** macOS Compatibility

**In-app purchases:** none


### Sensor Technology Engineering

[App page](https://appshunter.io/ios/app/sensor-technology-engineering/id1627959712)

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

**In-app purchases:** none


## Frequently asked questions

### Is Pitch Witch free?

Pitch Witch is free to download, with no in-app purchases.

### Is Sensor Technology Engineering free?

Sensor Technology Engineering is free to download, with no in-app purchases.

### Do Pitch Witch or Sensor Technology Engineering have ads?

Neither Pitch Witch nor Sensor Technology Engineering shows ads.

### Which is updated more often, Pitch Witch or Sensor Technology Engineering?

Pitch Witch ships an update every 9 days, and Sensor Technology Engineering every 7 months. Most recently, Pitch Witch was updated on July 5, 2026 and Sensor Technology Engineering on September 15, 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.*