# CA PRO DSP vs Lux Decibel Insight

The clearest difference is in-app purchases: CA PRO DSP at none against Lux Decibel Insight's 1. CA PRO DSP also leads on ads (none vs shown) and iOS requirement (15.6 vs 18.6). Lux Decibel Insight's advantage is update cadence (every 2 weeks vs every 2 months). On price and device support there is nothing between them.

Both are free to download. Lux Decibel Insight sells 1 one-off in-app purchase. CA PRO DSP asks for nothing beyond the download.

CA PRO DSP ships an update every 2 months, Lux Decibel Insight every 2 weeks. Both last shipped on November 5, 2026.

## The numbers

| Metric | CA PRO DSP | Lux Decibel Insight |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lux-decibel-insight-meter/id6782161913/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | — | Freemium |
| Size | 3 MB | 5 MB |
| Requires iOS | **15.6** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | +4 |
| Developer | [文胜 周](https://appshunter.io/developer/1247796141) | [cAsAxMoRe](https://appshunter.io/developer/448012278) |

## What reviewers say

### CA PRO DSP

[App page](https://appshunter.io/ios/app/ca-pro-dsp/id6755802167)

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

**In-app purchases:** none


### Lux Decibel Insight

[App page](https://appshunter.io/ios/app/lux-decibel-insight-meter/id6782161913)

Monitor real-time sound and light levels in your environment. Track variations, detect changes, and maintain a reference for various activities like work, study, or content creation. Export your measurement history for later analysis.

**Highlights:** Real-time sound level measurement (dB), Camera-based light estimation (lux), Live sound and light charts, Session average and peak sound values, Measurement history and CSV export, Simple session control

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lux Decibel Insight Premium | $1.99 | one-time |


## Frequently asked questions

### Is CA PRO DSP free?

CA PRO DSP is free to download, with no in-app purchases.

### Is Lux Decibel Insight free?

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

### Do CA PRO DSP or Lux Decibel Insight have ads?

Lux Decibel Insight shows ads; CA PRO DSP does not.

### Which is updated more often, CA PRO DSP or Lux Decibel Insight?

CA PRO DSP ships an update every 2 months, and Lux Decibel Insight every 2 weeks. Most recently, CA PRO DSP was updated on November 5, 2026 and Lux Decibel Insight on November 5, 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.*