# PCFCOne vs Illuminance Meter

The clearest difference is in-app purchases: PCFCOne at none against Illuminance Meter's 3. PCFCOne also leads on update cadence (every 5 days vs every 3 months) and iOS requirement (15.6 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Illuminance Meter sells 3 in-app purchases, starting at $3.99 per 7 days. PCFCOne asks for nothing beyond the download.

PCFCOne ships an update every 5 days, Illuminance Meter every 3 months. The most recent releases landed on October 17, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | PCFCOne | Illuminance Meter |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 3 months |
| Monetization | — | Free with in-app purchases |
| Size | 51 MB | 13 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [PCFC](https://appshunter.io/developer/1575524684) | [LEAN ASIA CO., LTD](https://appshunter.io/developer/1815050814) |

## What reviewers say

### PCFCOne

[App page](https://appshunter.io/ios/app/pcfcone/id6741824726)

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

**In-app purchases:** none


### Illuminance Meter

[App page](https://appshunter.io/ios/app/illuminance-meter-lux-ppfd/id6759972986)

Transform your iPhone into a professional light meter to measure illuminance in lux or foot-candles. Ideal for photographers, plant enthusiasts, and workplace safety, it provides instant, accurate light readings with various specialized modes and data export options.

**Highlights:** Real-time lux measurement with live gauge, Photography mode for exposure value (EV) calculation, Plant light mode with recommendations, Workplace standards verification, Measurement history with export options, Spectrum analysis for color temperature and CRI, Multiple illuminance unit switching

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly Plan | $3.99 | per 7 days |
| Premium Yearly | $19.99 | per year |
| Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is PCFCOne free?

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

### Is Illuminance Meter free?

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

### Do PCFCOne or Illuminance Meter have ads?

Neither PCFCOne nor Illuminance Meter shows ads.

### Which is updated more often, PCFCOne or Illuminance Meter?

PCFCOne ships an update every 5 days, and Illuminance Meter every 3 months. Most recently, PCFCOne was updated on October 17, 2026 and Illuminance Meter on October 12, 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.*