# Lux Meter Pros vs PLC Pro

The clearest difference is price: Lux Meter Pros at Free against PLC Pro's $9.99. PLC Pro's advantage is in-app purchases (none vs 3) and update cadence (every 5 days vs every 4 months). On ads, device support and iOS requirement there is nothing between them.

Lux Meter Pros is free to download; PLC Pro costs $9.99 up front. Lux Meter Pros sells 3 in-app purchases, starting at $0.99 per 7 days. PLC Pro asks for nothing beyond the download.

Lux Meter Pros ships an update every 4 months, PLC Pro every 5 days. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Lux Meter Pros | PLC Pro |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 25 MB | 47 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DADLINK TECHNOLOGIES LIMITED](https://appshunter.io/developer/1736032380) | [James Johnson](https://appshunter.io/developer/1861867738) |

## What reviewers say

### Lux Meter Pros

[App page](https://appshunter.io/ios/app/lux-meter-pros/id6740999944)

This tool transforms your iPhone into a professional light testing device. It measures lux levels, conducts emergency lighting discharge tests, and generates compliance certificates for UK electricians and facility managers.

**Highlights:** Real-time lux measurement, Photo-based light readings, Room grid mapping, Emergency light testing (BS 5266), Certificate generation (PDF), Exportable reports (PDF/CSV), Historical tracking

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Lux Pass | $0.99 | per 7 days |
| Monthly Lux Pass | $2.99 | per month |
| Annual Lux Pass | $24.99 | per year |


### PLC Pro

[App page](https://appshunter.io/ios/app/plc-pro/id6757437125)

**In-app purchases:** none


## Frequently asked questions

### Is Lux Meter Pros free?

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

### Is PLC Pro free?

PLC Pro costs $9.99, with no in-app purchases.

### Do Lux Meter Pros or PLC Pro have ads?

Neither Lux Meter Pros nor PLC Pro shows ads.

### Which is updated more often, Lux Meter Pros or PLC Pro?

Lux Meter Pros ships an update every 4 months, and PLC Pro every 5 days. Most recently, Lux Meter Pros was updated on October 13, 2026 and PLC Pro on October 7, 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.*