# Decibel vs SonoMeter

The clearest difference is ads: SonoMeter at none against Decibel's shown. Decibel's advantage is update cadence (monthly vs every 8 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Decibel sells 4 in-app purchases, starting at $2.49 per month and SonoMeter sells 4 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Decibel ships an update monthly, SonoMeter every 8 months. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Decibel | SonoMeter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (37 ratings)](https://appshunter.io/ios/app/decibel-db-sound-level-meter/id6443760208/reviews)** | — |
| Number of ratings | **37** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 8 months |
| Monetization | Free with in-app purchases | — |
| Size | 19 MB | 35 MB |
| Requires iOS | 16.0 | 16 |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kemal Bakacak](https://appshunter.io/developer/1475963902) | [Raphael Goupille](https://appshunter.io/developer/1650597250) |

## What reviewers say

### Decibel

[App page](https://appshunter.io/ios/app/decibel-db-sound-level-meter/id6443760208)

Transform your device into a professional sound level meter to detect harmful noises and protect your hearing. It also allows you to test and track your stereo and hearing performance with detailed history management. The app offers accurate measurements and a quick hearing test.

**Highlights:** Professional sound level meter, Hearing performance testing, Stereo and bass sound testing, High frequency sound generation, Accurate measurements, History data management, Dark mode support

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly - Noise Dosimeter | $2.49 | per month |
| Yearly - SPL & Decibel Meter | $9.99 | per year |
| Yearly Trial - Water Eject | $9.99 | per year |
| Lifetime - Hz Tone Generator | $15.99 | one-time |


### SonoMeter

[App page](https://appshunter.io/ios/app/sonometer-decibel-meter/id6745488403)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $1.99 | per 7 days |
| Monthly subscription | $5.99 | per month |
| Annual subscription | $24.99 | per year |
| Premium Lifetime | $6.99 | one-time |


## Frequently asked questions

### Is Decibel free?

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

### Is SonoMeter free?

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

### Do Decibel or SonoMeter have ads?

Decibel shows ads; SonoMeter does not.

### Which is updated more often, Decibel or SonoMeter?

Decibel ships an update monthly, and SonoMeter every 8 months. Most recently, Decibel was updated on October 27, 2026 and SonoMeter on October 25, 2026.

---

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