# Decibel：db Sound Meter vs Scanner

The clearest difference is ads: Decibel：db Sound Meter at none against Scanner's shown. Scanner's advantage is update cadence (every 9 days vs every 9 months). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Decibel：db Sound Meter sells 3 in-app purchases, starting at $3.99 per 7 days and Scanner sells 3 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Decibel：db Sound Meter ships an update every 9 months, Scanner every 9 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Decibel：db Sound Meter | Scanner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/scanner-pdf-scanner/id6740763210/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 8.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Every 9 days** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 27 MB | 33 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 9+ | +9 |
| Developer | [Qinghe Net LLC](https://appshunter.io/developer/1780821316) | [Guangzhou Linke Technology Co., Ltd](https://appshunter.io/developer/6776569852) |

## What reviewers say

### Decibel：db Sound Meter

[App page](https://appshunter.io/ios/app/decibeldb-sound-meter/id6740468843)

Measure noise levels accurately with this practical tool. It offers real-time decibel monitoring, photo and video recording with decibel watermarks, and downloadable reports for easy noise management.

**Highlights:** Real-time decibel monitoring, Photo recording with decibel watermark, Real-time video recording, Downloadable monitoring reports, Detailed decibel detection records

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Members | $3.99 | per 7 days |
| Monthly Membership | $5.99 | per month |
| Annual Membership | $14.99 | per year |


### Scanner

[App page](https://appshunter.io/ios/app/scanner-pdf-scanner/id6740763210)

This app offers robust document scanning with intelligent camera features, text recognition, and ID scanning. Convert documents to various formats, measure real-time data with AR, and import files from multiple sources for quick mobile management.

**Highlights:** Intelligent camera scanning, Text recognition (OCR), ID scanning, Multiple format conversions, AR measurement, Import files, Mobile file management

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Members | $3.99 | per 7 days |
| Monthly Membership | $5.99 | one-time |
| Annual Membership | $14.99 | one-time |


## Frequently asked questions

### Is Decibel：db Sound Meter free?

Decibel：db Sound Meter is free to download, with in-app purchases available.

### Is Scanner free?

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

### Do Decibel：db Sound Meter or Scanner have ads?

Scanner shows ads; Decibel：db Sound Meter does not.

### Which is updated more often, Decibel：db Sound Meter or Scanner?

Decibel：db Sound Meter ships an update every 9 months, and Scanner every 9 days. Most recently, Decibel：db Sound Meter was updated on October 24, 2026 and Scanner on October 24, 2026.

---

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