# Decibel meter test vs Cepstrum

The clearest difference is update cadence: Cepstrum at every 2 days against Decibel meter test's every 4 weeks. Decibel meter test's advantage is iOS requirement (13.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Decibel meter test sells 1 in-app purchase, starting at $6.99 per 7 days and Cepstrum sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Decibel meter test ships an update every 4 weeks, Cepstrum every 2 days. The most recent releases landed on September 29, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Decibel meter test | Cepstrum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/decibel-meter-test/id6742873854/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 2 days** |
| Monetization | Freemium | — |
| Size | 37 MB | 9 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [玉珍 李](https://appshunter.io/developer/1547803211) | [Tongkun Lan](https://appshunter.io/developer/1870124868) |

## What reviewers say

### Decibel meter test

[App page](https://appshunter.io/ios/app/decibel-meter-test/id6742873854)

This tool measures environmental noise levels in real-time, records test history, and helps manage noisy surroundings. It offers precise decibel readings and scene capture for analysis.

**Highlights:** Real-time decibel testing, Surrounding noise detection, Scene capture with noise levels, Automatic test record saving, Historical measurement analysis, Simple and easy to use

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One week membership | $6.99 | per 7 days |


### Cepstrum

[App page](https://appshunter.io/ios/app/cepstrum/id6799487881)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cepstrum | $4.99 | one-time |


## Frequently asked questions

### Is Decibel meter test free?

Decibel meter test is free to download, with in-app purchases available.

### Is Cepstrum free?

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

### Do Decibel meter test or Cepstrum have ads?

Neither Decibel meter test nor Cepstrum shows ads.

### Which is updated more often, Decibel meter test or Cepstrum?

Decibel meter test ships an update every 4 weeks, and Cepstrum every 2 days. Most recently, Decibel meter test was updated on September 29, 2026 and Cepstrum on October 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*