# Sound Meter HQ vs D

The clearest difference is in-app purchases: D at none against Sound Meter HQ's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Sound Meter HQ sells 1 one-off in-app purchase. D asks for nothing beyond the download.

Sound Meter HQ ships an update every 4 months, D every 3 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Sound Meter HQ | D |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (349 ratings)](https://appshunter.io/ios/app/sound-meter-hq/id1093419762/reviews)** | — |
| Number of ratings | **349** | — |
| Positive reviews | 37.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Free with in-app purchases | — |
| Size | 13 MB | 32 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ExaMobile S.A.](https://appshunter.io/developer/506014841) | [Dislock Sistemas S.L.](https://appshunter.io/developer/1538035294) |

## What reviewers say

### Sound Meter HQ

[App page](https://appshunter.io/ios/app/sound-meter-hq/id1093419762)

This application measures noise and sound levels using your device's microphone. It displays results in decibels on a logarithmic graph and allows for calibration to ensure accuracy. You can record minimum, average, and maximum sound levels.

**Highlights:** Measure sound level, Vibration meter, Noise detector, Record Min, AVG, Max levels, Logarithmic dB graph, Manual and auto calibration

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $1.99 | one-time |


### D

[App page](https://appshunter.io/ios/app/d-lock/id1538035292)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Sound Meter HQ free?

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

### Is D free?

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

### Do Sound Meter HQ or D have ads?

Neither Sound Meter HQ nor D shows ads.

### Which is updated more often, Sound Meter HQ or D?

Sound Meter HQ ships an update every 4 months, and D every 3 months. Most recently, Sound Meter HQ was updated on November 6, 2026 and D on November 3, 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.*