# Decibel Tester vs Sound Level & Spectrogram

The clearest difference is in-app purchases: Sound Level & Spectrogram at none against Decibel Tester's 2. Decibel Tester's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 5 months). On price and device support there is nothing between them.

Both are free to download. Decibel Tester sells 2 in-app purchases, starting at $6.99 per month. Sound Level & Spectrogram asks for nothing beyond the download.

Decibel Tester ships an update every 2 weeks, Sound Level & Spectrogram every 5 months. The most recent releases landed on September 29, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Decibel Tester | Sound Level & Spectrogram |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/decibel-tester-sound-level/id6445815477/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 5 months |
| Monetization | Freemium | **Ad-supported** |
| Size | 14 MB | 4 MB |
| Requires iOS | **13.4** | 18.7 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [钰乐 晏](https://appshunter.io/developer/1680830617) | [TOON,LLC](https://appshunter.io/developer/633948723) |

## What reviewers say

### Decibel Tester

[App page](https://appshunter.io/ios/app/decibel-tester-sound-level/id6445815477)

Measure sound levels with professional accuracy using this tool. It supports various frequency weightings and allows you to save and share recordings to protect your hearing from harmful noise.

**Highlights:** Accurate sound level measurements, Supports dBa, dBb, dBc, dBz weighting, Save and share recordings, Spectrum analysis, Audible frequency range 20-16,000 Hz

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Decibel Tester Subscribe Month | $6.99 | per month |
| Decibel Tester Subscribe Year | $29.99 | per year |


### 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 Decibel Tester free?

Decibel Tester 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 Decibel Tester or Sound Level & Spectrogram have ads?

Sound Level & Spectrogram shows ads; Decibel Tester does not.

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

Decibel Tester ships an update every 2 weeks, and Sound Level & Spectrogram every 5 months. Most recently, Decibel Tester was updated on September 29, 2026 and Sound Level & Spectrogram on October 6, 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.*