# Voice Spectrogram Logger vs Vernier Spectral Analysis

The clearest difference is rating: Vernier Spectral Analysis at 2.2 against Voice Spectrogram Logger's 1.0. Vernier Spectral Analysis also leads on in-app purchases (none vs 1) and ratings volume (61 vs 1). On price, update cadence, ads and monetization model there is nothing between them.

Both are free to download. Voice Spectrogram Logger sells 1 one-off in-app purchase. Vernier Spectral Analysis asks for nothing beyond the download.

Vernier Spectral Analysis holds the better App Store score, 2.2 against 1.0. That said, the two scores are not equally well evidenced: Vernier Spectral Analysis has 61 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of Voice Spectrogram Logger's written reviews are positive against 21% of Vernier Spectral Analysis's.

Voice Spectrogram Logger ships an update every 15 months, Vernier Spectral Analysis every 8 months. The most recent releases landed on July 29, 2026 and August 21, 2026 respectively.

## The numbers

| Metric | Voice Spectrogram Logger | Vernier Spectral Analysis |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/voice-spectrogram-logger/id1277134462/reviews) | **[2.2 (61 ratings)](https://appshunter.io/ios/app/vernier-spectral-analysis/id1323245536/reviews)** |
| Number of ratings | 1 | **61** |
| Positive reviews | 0.0% of reviews | **21.1% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 8 months** |
| Monetization | Free | Free |
| Size | 7 MB | 38 MB |
| Requires iOS | **15.5** | 16.7.8 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Yukiko Iwai](https://appshunter.io/developer/965630131) | [Vernier Software & Technology](https://appshunter.io/developer/389784250) |

## What reviewers say

### Voice Spectrogram Logger

[App page](https://appshunter.io/ios/app/voice-spectrogram-logger/id1277134462)

Visualize voice frequencies in a spectrogram from 20-2500Hz. Adjust display with sliders and log recordings to export as PNG files. Functions fully offline and supports background processing.

**Highlights:** Real-time voice spectrogram display, Adjustable frequency range (20-2500Hz), Zoomable spectrogram with pinch gestures, Customizable spectrogram gradation, Logging mode with history export, Offline functionality

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $3.99 | one-time |


### Vernier Spectral Analysis

[App page](https://appshunter.io/ios/app/vernier-spectral-analysis/id1323245536)

This free app enables students to perform spectral analysis in biology and chemistry labs. It facilitates data collection and analysis for topics like Beer's Law and enzyme kinetics. The user-friendly interface guides students through the process, offering features like curve fitting.

**Highlights:** Full spectrum data collection, Beer's Law exploration, Enzyme kinetics analysis, Plant pigment studies, Curve fitting, Data interpolation

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Voice Spectrogram Logger free?

Voice Spectrogram Logger is free to download, with in-app purchases available.

### Is Vernier Spectral Analysis free?

Vernier Spectral Analysis is free to download, with no in-app purchases.

### Which has better reviews, Voice Spectrogram Logger or Vernier Spectral Analysis?

Vernier Spectral Analysis is rated higher. Voice Spectrogram Logger averages 1.0 out of 5 from 1 ratings, while Vernier Spectral Analysis averages 2.2 from 61 ratings.

### Do Voice Spectrogram Logger or Vernier Spectral Analysis have ads?

Neither Voice Spectrogram Logger nor Vernier Spectral Analysis shows ads.

### Which is updated more often, Voice Spectrogram Logger or Vernier Spectral Analysis?

Voice Spectrogram Logger ships an update every 15 months, and Vernier Spectral Analysis every 8 months. Most recently, Voice Spectrogram Logger was updated on July 29, 2026 and Vernier Spectral Analysis on August 21, 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.*