# Light Meter Pro - Lux Measure — Study, Photo & Plants—No Subs

> Study, Photo & Plants—No Subs (iPhone/iPad app by Guangzhou Ciyou Network Technology Co., Ltd..)

- Source: https://appshunter.io/ios/app/light-meter-pro-lux-measure/id6777116706 (this page in markdown: same URL + `.md`)
- Developer: [Guangzhou Ciyou Network Technology Co., Ltd.](https://appshunter.io/developer/6776298572)
- Category: Utilities, Photo & Video
- Price: $2.99
- Age rating: 4+
- Requires: iOS 17.0 · 16 MB
- Languages: American English, Arabic, Bangla, Catalan, Croatian, Czech, Danish, Dutch, Finnish, Canadian French and 34 more
- Released: 2026-06-16
- Data updated: 2026-08-27
- User reviews in markdown: https://appshunter.io/ios/app/light-meter-pro-lux-measure/id6777116706/reviews.md

## What is Light Meter Pro?

Light Meter Pro turns your iPhone or iPad camera into an everyday light reference tool.

Measure light levels on desks, reading pages, screen environments, as well as photography exposure and plant grow lights. The app estimates Lux, Color Temperature, EV100, PPFD, and DLI, offering clear adjustment suggestions tailored to your current scenario.

Key Features:
- Study & Reading Light Check: Evaluates lighting conditions for desks, books, and screen environments.
- Photography Exposure Reference: Supports shutter speed, ISO, aperture, EV100, and suggested parameters.
- Plant Lighting Estimation: Covers canopy illuminance, PPFD, DLI, and daily light hours.
- Dual Measurement Modes: Supports both front-facing incident light and rear-facing reflected light measurement.
- Custom Calibration: Allows you to adjust metering coefficients by comparing readings with a professional lux meter.
- 100% Privacy-Focused: All processing is done locally on your device. No accounts required, no cloud uploads, and photos are never saved.

Ideal Use Cases:
- Checking ambient light to ensure a healthy environment for children’s homework, reading, or screen time.
- Quickly referencing exposure parameters and EV differences before a photoshoot.
- Determining if indoor plants need supplementary grow lights or a change of location.
- Comparing lighting changes across different lamps, locations, and times of day.

Important Disclaimer:
Smartphone cameras are not metrologically certified lux meters, color temperature meters, spectrometers, PAR sensors, or professional photographic light meters. Light Meter Pro is designed for quick comparisons, home lighting adjustments, and pre-shoot estimates. For lighting compliance inspections, medical assessments, commercial testing, or precision agriculture, please use calibrated professional instruments.


## Version history (last 4 releases)

### 1.3 — 2026-07-28

Version 1.3 adds more languages, focused guidance for study and plants, improved exposure and flicker estimates, new PPFD/DLI calculations for white light, and better measurement stability.

### 1.2 — 2026-06-25

You can now share Light Meter Pro with friends in one tap.
If it helped you tune a desk lamp, check light before a shoot, or find better lighting for your plants, it is now easier to pass it along to someone who might need it too.
We also fixed a few known issues to make the app feel smoother and more reliable.

### 1.1 — 2026-06-21

Improved light measurement for study, photography, and plants, with refined interface text, measurement guidance, and device compatibility.

### 1.0 — 2026-06-16

No release notes.

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## More apps by Guangzhou Ciyou Network Technology Co., Ltd.

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All apps by Guangzhou Ciyou Network Technology Co., Ltd.: https://appshunter.io/developer/6776298572

## Related topics

[brightness measure](https://appshunter.io/ios/topics/brightness-measure) · [light measurement apps for researchers](https://appshunter.io/ios/topics/light-measurement-apps-for-researchers)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*