# dB Meter vs Quick3D CAD Viewer

The clearest difference is in-app purchases: Quick3D CAD Viewer at none against dB Meter's 1. dB Meter's advantage is ads (none vs shown) and update cadence (every 4 days vs every 2 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. dB Meter sells 1 one-off in-app purchase. Quick3D CAD Viewer asks for nothing beyond the download.

dB Meter ships an update every 4 days, Quick3D CAD Viewer every 2 weeks. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | dB Meter | Quick3D CAD Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/db-meter-decibel-spl-spectrum/id6767850405/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 28 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Michael Borison](https://appshunter.io/developer/1691245822) | [Ryo Tazaki](https://appshunter.io/developer/6814366399) |

## What reviewers say

### dB Meter

[App page](https://appshunter.io/ios/app/db-meter-decibel-spl-spectrum/id6767850405)

Instantly measure sound levels with a real-time analog gauge. Analyze noise with average, peak, and time-averaged readings. Features include low-frequency indication and on-device calibration for accuracy. Works offline without internet.

**Highlights:** Real-time dB sound level measurement, Live min/average/peak readout, LAeq and LCeq time-averaged readings, Low-frequency indicator, Analog display, On-device calibration, Offline functionality

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| dBMeter Pro | $4.99 | one-time |


### Quick3D CAD Viewer

[App page](https://appshunter.io/ios/app/quick3d-cad-viewer/id6816122073)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is dB Meter free?

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

### Is Quick3D CAD Viewer free?

Quick3D CAD Viewer is free to download, with no in-app purchases.

### Do dB Meter or Quick3D CAD Viewer have ads?

Quick3D CAD Viewer shows ads; dB Meter does not.

### Which is updated more often, dB Meter or Quick3D CAD Viewer?

dB Meter ships an update every 4 days, and Quick3D CAD Viewer every 2 weeks. Most recently, dB Meter was updated on October 24, 2026 and Quick3D CAD Viewer on October 29, 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.*