# VoicePrinter vs Sound Level & Spectrogram

The clearest difference is in-app purchases: Sound Level & Spectrogram at none against VoicePrinter's 1. Sound Level & Spectrogram also leads on update cadence (every 5 months vs every 47 months). VoicePrinter's advantage is iOS requirement (15.0 vs 18.7). On price, ads and device support there is nothing between them.

Both are free to download. VoicePrinter sells 1 one-off in-app purchase. Sound Level & Spectrogram asks for nothing beyond the download.

VoicePrinter ships an update every 47 months, Sound Level & Spectrogram every 5 months. The most recent releases landed on August 28, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | VoicePrinter | Sound Level & Spectrogram |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/voiceprinter/id1180382943/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 47 months | **Every 5 months** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 5 MB | 4 MB |
| Requires iOS | **15.0** | 18.7 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [HIROFUMI MARUO](https://appshunter.io/developer/667820705) | [TOON,LLC](https://appshunter.io/developer/633948723) |

## What reviewers say

### VoicePrinter

[App page](https://appshunter.io/ios/app/voiceprinter/id1180382943)

Analyze sound and voice in real-time with detailed visual representations. Explore human voices, environmental sounds, music, and more. Offers recording, playback, and import/export features with a premium upgrade.

**Highlights:** Real-time sound visualization, Human voice analysis, Environmental sound analysis, Music analysis, Recording and playback, Import/export audio files

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Functions | $0.99 | one-time |


### Sound Level & Spectrogram

[App page](https://appshunter.io/ios/app/sound-level-and-spectrogram/id6503722682)

Measure sound levels in decibels and visualize sound frequencies with a real-time spectrogram. Understand your environment's noise and protect your health. Offers advanced settings for accurate acoustic analysis.

**Highlights:** Sound level measurement (dB), Real-time spectrogram analysis, Frequency weighting correction (A, C, Z), Time weighting characteristics (Fast, Slow), Time course graph, Environmental noise measurement

**In-app purchases:** none


## Frequently asked questions

### Is VoicePrinter free?

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

### Is Sound Level & Spectrogram free?

Sound Level & Spectrogram is free to download, with no in-app purchases.

### Do VoicePrinter or Sound Level & Spectrogram have ads?

Both VoicePrinter and Sound Level & Spectrogram show ads.

### Which is updated more often, VoicePrinter or Sound Level & Spectrogram?

VoicePrinter ships an update every 47 months, and Sound Level & Spectrogram every 5 months. Most recently, VoicePrinter was updated on August 28, 2026 and Sound Level & Spectrogram on September 18, 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.*