# Decibel vs Scent Scape

The clearest difference is in-app purchases: Scent Scape at none against Decibel's 4. Scent Scape also leads on ads (none vs shown) and update cadence (weekly vs monthly). On price, 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. Scent Scape asks for nothing beyond the download.

Decibel ships an update monthly, Scent Scape weekly. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Decibel | Scent Scape |
| --- | --- | --- |
| 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 | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 19 MB | 22 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Kemal Bakacak](https://appshunter.io/developer/1475963902) | [Emieti(shenzhen)Technology Co.,Ltd](https://appshunter.io/developer/6772128664) |

## 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 |


### Scent Scape

[App page](https://appshunter.io/ios/app/scent-scape/id6772128661)

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

**In-app purchases:** none


## Frequently asked questions

### Is Decibel free?

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

### Is Scent Scape free?

Scent Scape is free to download, with no in-app purchases.

### Do Decibel or Scent Scape have ads?

Decibel shows ads; Scent Scape does not.

### Which is updated more often, Decibel or Scent Scape?

Decibel ships an update monthly, and Scent Scape weekly. Most recently, Decibel was updated on November 7, 2026 and Scent Scape on October 31, 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.*