# Voice Spectrogram Logger vs Estill Exercises

The clearest difference is rating: Estill Exercises at 5.0 against Voice Spectrogram Logger's 1.0. Estill Exercises also leads on review sentiment (38% vs 0%) and update cadence (every 6 weeks vs every 15 months). Voice Spectrogram Logger's advantage is monetization model (free vs subscription). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Voice Spectrogram Logger sells 1 one-off in-app purchase and Estill Exercises sells 1 in-app purchase, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Estill Exercises holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews point the same way: 0% of Voice Spectrogram Logger's written reviews are positive against 38% of Estill Exercises's.

Voice Spectrogram Logger ships an update every 15 months, Estill Exercises every 6 weeks. The most recent releases landed on July 29, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Voice Spectrogram Logger | Estill Exercises |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/voice-spectrogram-logger/id1277134462/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/estill-exercises/id1526848882/reviews)** |
| Number of ratings | 1 | **2** |
| Positive reviews | 0.0% of reviews | **37.5% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 6 weeks** |
| Monetization | **Free** | Subscription |
| Size | 7 MB | 16 MB |
| Requires iOS | 15.5 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Yukiko Iwai](https://appshunter.io/developer/965630131) | [Estill Voice International, LLC](https://appshunter.io/developer/1222358364) |

## 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 |


### Estill Exercises

[App page](https://appshunter.io/ios/app/estill-exercises/id1526848882)

Master vocal techniques with guided exercises and expert instruction. Track your progress, review study materials in multiple languages, and connect with a community of learners. Perfect for both beginners and experienced users looking to refine their voice.

**Highlights:** Personalized user center with notes and bookmarks, Study materials in 6 languages, Expert-guided video lessons, Progress tracking and practice logging, Audio training exercises, Interactive flashcards for exam prep, Attractor state check-in

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Estill Exercises Monthly | $9.99 | per month |


## Frequently asked questions

### Is Voice Spectrogram Logger free?

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

### Is Estill Exercises free?

Estill Exercises is free to download, with in-app purchases available.

### Which has better reviews, Voice Spectrogram Logger or Estill Exercises?

Estill Exercises is rated higher. Voice Spectrogram Logger averages 1.0 out of 5 from 1 ratings, while Estill Exercises averages 5.0 from 2 ratings.

### Do Voice Spectrogram Logger or Estill Exercises have ads?

Neither Voice Spectrogram Logger nor Estill Exercises shows ads.

### Which is updated more often, Voice Spectrogram Logger or Estill Exercises?

Voice Spectrogram Logger ships an update every 15 months, and Estill Exercises every 6 weeks. Most recently, Voice Spectrogram Logger was updated on July 29, 2026 and Estill Exercises on September 13, 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.*