Measure ambient light levels in Lux using your iPhone's camera. Optimize sleep quality by understanding light exposure throughout the day and night.




219+ iOS apps curated and reviewed
The best libre light sensor apps on iPhone average 4.2★ across 219+ titles — we've ranked them by what real users actually keep on their phones. Updated June 2026.




Measure ambient light levels in Lux using your iPhone's camera. Optimize sleep quality by understanding light exposure throughout the day and night.




Transform your smartphone into a professional light meter. Measure illuminance and color temperature with scientifically validated accuracy, trusted by professionals. Requires a simple diffuser for precise readings.






This app acts as a professional-grade light meter for plants, measuring PAR, PPFD, DLI, and more using your device's camera. It helps optimize plant lighting by providing accurate readings and in-app guides, with optional advanced features available through purchase.


This app translates your car's diagnostic trouble codes into plain language, helping you understand potential issues and their severity. It provides maintenance reminders and offers advanced features like issue forecasting and emissions pre-checks with a premium subscription.


Control your wireless LED lights via Bluetooth. Adjust colors, brightness, and dynamic lighting effects like jump, fade, and strobe. Explore unique modes such as voice, twinkle, and meteor for personalized ambiance.


This app functions as a standalone reflective light meter or pairs with hardware for professional flash and color temperature measurements. It offers various modes for photography and videography, storing measurements with notes and location.


This app transforms your device into a powerful lighted magnifying glass. Easily read small print in dim lighting, menus, or medicine bottles. Features include zoom, image capture, and an auto-focus lock.


Control your home and garden lighting from anywhere in the world with this mobile app. Customize colors, brightness, and create dynamic light effects to enhance your living space and improve safety, all while potentially reducing power consumption.




Accurately measure ambient light levels in Lux or Foot Candles using your phone's camera. This tool is ideal for photography, comparing light sources, or indoor gardening. It's designed for ease of use and provides precise readings.


This app helps indoor plant owners assess the light conditions their plants are receiving. By using your phone's camera, you can measure light levels and understand if they are optimal for your specific plant's needs, preventing common issues like lack of light.


This app functions as a portable light meter, essential for film photographers using manual cameras. It accurately measures reflected light and provides reciprocity calculations for precise exposure control.


Control your RGB smart lights and strips universally via WiFi and Bluetooth. Adjust brightness, color temperature, and color with an intuitive interface. Create custom scenes or choose from pre-set options to set the perfect mood for any occasion.


Remotely manage your lights and devices, set schedules for automatic operation, and create custom environments for any occasion. Enjoy simple voice control and share access with your family for seamless home automation.


This app measures light intensity in lux and provides real-time exposure suggestions for photography. It offers customizable settings for shutter speed, aperture, and ISO, with options for both front and back cameras. It's designed for personal use to optimize lighting and capture better photos.


Control smart LED lights from various brands in one app. Group lights by room, adjust brightness, sync with music, and choose from pre-set or custom scenes with millions of color options. Compatible with Wi-Fi and Bluetooth bulbs, lightstrips, and lamps.


This utility app converts light intensity into sound, allowing users to perceive their surroundings through audio cues. Point your device's camera at any light source to hear variations in pitch based on brightness. It's designed to assist users, particularly those who are blind, in navigating and understanding their environment.


Easily connect to and customize your smart LED lights. Control colors, brightness, and dynamic effects to create the perfect ambiance for any occasion. Offers multiple connection options and a built-in guide for simple setup.


This utility app provides adjustable illumination for dark environments. It offers a red light mode to preserve night vision and a bulb light mode to prevent color cast in photography. Ideal for stargazing, camera adjustments, or any task requiring light without compromising sight.


Control your official light stick for enhanced concert experiences. Connect via Bluetooth to sync with seat information for synchronized performances or customize colors in self-mode. Monitor battery levels to ensure uninterrupted enjoyment.