# Decibel Meter vs lens

The clearest difference is in-app purchases: lens at none against Decibel Meter's 3. lens also leads on update cadence (every 5 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Decibel Meter sells 3 in-app purchases, starting at $2.99 per 7 days. lens asks for nothing beyond the download.

Decibel Meter ships an update monthly, lens every 5 days. Both last shipped on October 28, 2026.

## The numbers

| Metric | Decibel Meter | lens |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (55 ratings)](https://appshunter.io/ios/app/decibel-meter-db-noise-level/id6744018521/reviews)** | — |
| Number of ratings | **55** | — |
| Positive reviews | 70.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 176 MB | 47 MB |
| Requires iOS | **16.0** | 16.4 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [PaoApps](https://appshunter.io/developer/1746019535) | [Jannik Nitz](https://appshunter.io/developer/1755415632) |

## What reviewers say

### Decibel Meter

[App page](https://appshunter.io/ios/app/decibel-meter-db-noise-level/id6744018521)

This tool transforms your iPhone into a real-time sound level meter. It measures and displays environmental noise in decibels, helping you monitor sound at home, work, or outdoors. Protect your hearing by detecting loud noises and staying aware of your sound environment.

**Highlights:** Real-time decibel measurement, Dynamic graph display, Min/Max/Average sound levels, Measuring timer, Pause and Reset buttons, Noise pollution checks

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Access with Trial | $2.99 | per 7 days |
| Weekly Access | $2.99 | per 7 days |
| Yearly Access | $17.99 | per year |


### lens

[App page](https://appshunter.io/ios/app/lens/id6785201721)

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

**In-app purchases:** none


## Frequently asked questions

### Is Decibel Meter free?

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

### Is lens free?

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

### Do Decibel Meter or lens have ads?

Neither Decibel Meter nor lens shows ads.

### Which is updated more often, Decibel Meter or lens?

Decibel Meter ships an update monthly, and lens every 5 days. Most recently, Decibel Meter was updated on October 28, 2026 and lens on October 28, 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.*