Light Meter Pro - Lux Measure

Study, Photo & Plants—No Subs

$2.99 · Designed for iPad. Not verified for macOS.

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.

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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.

Version 1.3

The developer, Guangzhou Ciyou Network Technology Co., Ltd., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • Guangzhou Ciyou Network Technology Co., Ltd.
    Size
    • 16.9 MB
    Category
    • Utilities
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English and 43 more
    • English, Arabic, Bengali, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Gujarati, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Kannada, Korean, Malay, Malayalam, Marathi, Norwegian Bokmål, Oriya, Polish, Portuguese, Punjabi, Romanian, Russian, Simplified Chinese, Slovak, Slovenian, Spanish, Swedish, Tamil, Telugu, Thai, Traditional Chinese, Turkish, Ukrainian, Urdu, Vietnamese
    Age Rating
    4+
    Copyright
    • ©Guangzhou Ciyou Network Technology Co.,Ltd.
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

    More by Guangzhou Ciyou Network Technology Co., Ltd.

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