# Voice Spectrogram Logger vs Mandel Draw

The clearest difference is review sentiment: Mandel Draw at 53% against Voice Spectrogram Logger's 0%. Mandel Draw also leads on rating (4.5 vs 1.0) and update cadence (weekly vs every 15 months). Voice Spectrogram Logger's advantage is monetization model (free vs free with in-app purchases). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Voice Spectrogram Logger sells 1 one-off in-app purchase and Mandel Draw sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Mandel Draw holds the better App Store score, 4.5 against 1.0. That said, the two scores are not equally well evidenced: Mandel Draw has 147 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 53% of Mandel Draw's.

Voice Spectrogram Logger ships an update every 15 months, Mandel Draw weekly. The most recent releases landed on October 2, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Voice Spectrogram Logger | Mandel Draw |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/voice-spectrogram-logger/id1277134462/reviews) | **[4.5 (147 ratings)](https://appshunter.io/ios/app/mandel-draw/id1547068084/reviews)** |
| Number of ratings | 1 | **147** |
| Positive reviews | 0.0% of reviews | **53.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 15 months | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 7 MB | 22 MB |
| Requires iOS | **15.5** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Yukiko Iwai](https://appshunter.io/developer/965630131) | [Kouji Mori](https://appshunter.io/developer/1458257715) |

## 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 |


### Mandel Draw

[App page](https://appshunter.io/ios/app/mandel-draw/id1547068084)

Explore the infinite beauty of fractals with this intuitive drawing app. Generate Mandelbrot and Julia sets with numerous functions and color palettes. Enjoy simple touch controls for navigation and advanced settings for high-resolution output and iCloud syncing.

**Highlights:** Mandelbrot and Julia set generation, 80+ fractal functions, 20+ color palettes, Intuitive touch controls (drag, pinch, tap), High-resolution output, iCloud Sync for favorites and palettes

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock | $1.99 | one-time |


## Frequently asked questions

### Is Voice Spectrogram Logger free?

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

### Is Mandel Draw free?

Mandel Draw is free to download, with in-app purchases available.

### Which has better reviews, Voice Spectrogram Logger or Mandel Draw?

Mandel Draw is rated higher. Voice Spectrogram Logger averages 1.0 out of 5 from 1 ratings, while Mandel Draw averages 4.5 from 147 ratings.

### Do Voice Spectrogram Logger or Mandel Draw have ads?

Neither Voice Spectrogram Logger nor Mandel Draw shows ads.

### Which is updated more often, Voice Spectrogram Logger or Mandel Draw?

Voice Spectrogram Logger ships an update every 15 months, and Mandel Draw weekly. Most recently, Voice Spectrogram Logger was updated on October 2, 2026 and Mandel Draw on October 14, 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.*