# Illuminance Meter vs LuxTest

The clearest difference is price: Illuminance Meter at Free against LuxTest's $0.99. LuxTest's advantage is in-app purchases (none vs 3) and update cadence (monthly vs every 3 months). On ads and device support there is nothing between them.

Illuminance Meter is free to download; LuxTest costs $0.99 up front. Illuminance Meter sells 3 in-app purchases, starting at $3.99 per 7 days. LuxTest asks for nothing beyond the download.

Illuminance Meter ships an update every 3 months, LuxTest monthly. The most recent releases landed on November 12, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Illuminance Meter | LuxTest |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 13 MB | 35 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [LEAN ASIA CO., LTD](https://appshunter.io/developer/1815050814) | [晓燕 王](https://appshunter.io/developer/1891891243) |

## What reviewers say

### 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 |


### LuxTest

[App page](https://appshunter.io/ios/app/luxtest-study-light-meter/id6761891597)

**In-app purchases:** none


## Frequently asked questions

### Is Illuminance Meter free?

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

### Is LuxTest free?

LuxTest costs $0.99, with no in-app purchases.

### Do Illuminance Meter or LuxTest have ads?

Neither Illuminance Meter nor LuxTest shows ads.

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

Illuminance Meter ships an update every 3 months, and LuxTest monthly. Most recently, Illuminance Meter was updated on November 12, 2026 and LuxTest on November 9, 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.*