iPhone Duo support. • Unfold and the screen splits in two — camera preview on the left, readings on the right. The divider follows the hinge position the device reports • On the folded outer screen, all six readings (illuminance, exposure, luminous intensity, color temperature, contrast, noise) still fit without scrolling The metered area is now exact. • The rectangle on screen matches the region the camera actually measures, instead of an estimate that drifted with the screen's aspect ratio • When the metering point sits near an edge, the rectangle is clipped just as the sampling is • If the metered area ends up hidden behind a screen element, it turns red to tell you Also • Location and photo permission prompts are now translated into Korean and Japanese

The measuring screen is new, in two modes. • Instrument — read all six values at once without scrolling: illuminance, exposure (EV), luminous intensity, color temperature, contrast and noise. The camera preview and the metered area sit at the top • Viewfinder — the whole screen becomes the preview and you meter exactly where you aim. Switch modes with the left toolbar button • Opaque panels, so values stay readable in bright daylight • All six toolbar buttons are now labeled Grow light measurement • PPFD — pick your light source and the app converts illuminance (lux) to PPFD. Turn it on in Settings → Grow Light • DLI (Pro) — daily light integral from your light hours • 8 light-source presets plus a custom conversion factor (Pro) • PPFD is saved with your history and included in CSV export Note: PPFD is an estimate derived from illuminance, not a spectral measurement. For precision growing, a dedicated PAR sensor is recommended. Also • Trend charts now use your full history on the free tier (the list still shows the latest 10) • Fixed a case where illuminance could be computed incorrectly

A first-run guide now shows what LightScope can do before you start. • First-run guide — explains how the camera measures light • Pick a time range directly on the history chart; your choice is remembered • Clear message instead of an empty chart when a range has no readings • The Pro screen now leads with the feature you just reached for

Improved the accuracy and reliability of measurement features. • Fixed the calibration wizard's 3-second measurement never completing • Improved spot metering — tap the screen and lux, exposure (EV) and candela are re-measured at that point • Measurement lock now freezes the preview as well as the readings, and saved photos match the locked moment • Fixed the Pro screen sometimes failing to load pricing, and added a retry button

LightScope is now free! If you bought the app before, all Pro features unlock automatically. Massive 3.0 update: • Exposure (EV) calculator with shutter speed suggestions for your ISO and aperture • Improved color temperature engine + tint (green-magenta) display • Calibration wizard — auto-calibrate against a reference lux meter • Spot metering · Measurement lock (AE/AWB) • Continuous logging (1-60s interval) • Export all history as CSV/PDF • Full-resolution image capture • Notes & location tags • Home Screen widget

LightScope is a comprehensive solution providing professional light measurement and analysis using your iOS device's camera sensor. 【Key Measurement Features】 • Illuminance (lux) Measurement: Calculates accurate illuminance by analyzing EXIF data from the camera sensor. Illuminance is derived using the formula: (F-number² / (Exposure Time × ISO)) × Calibration Factor. • Luminous Intensity (candela) Calculation: Automatically calculates the luminous intensity of a light source based on the set distance. Uses the formula: Illuminance (lux) × Distance². • Color Temperature (K) Analysis: Precisely measures color temperature in the range of 1500K~15000K by converting RGB values to XYZ color space using McCamy's formula. • Real-time Histogram: Visualizes the balance of shadows, midtones, and highlights through 16-level brightness distribution analysis. • Contrast Ratio Measurement: Evaluates the ratio between the brightest and darkest parts of a scene according to WCAG accessibility standards. • Noise Measurement (SNR): Calculates the signal-to-noise ratio in dB to evaluate image quality in the shooting environment. 【Advanced Features】 • Image Capture and Storage: Captures camera images at the time of measurement and stores them with measurement data. • Full-screen Image View: Zoom, pan, and rotate captured images for detailed inspection. • Gallery Saving: Save captured images to your device's photo library. • Measurement History and Trends: Save all measurements chronologically and visualize trends with graphs. • Camera Full-screen Mode: Hide panels to focus on the camera view while checking key measurements via a mini info panel. • Perfect Dark/Light Mode Support: All UI elements automatically adapt to the system theme. 【User Settings】 • Illuminance Calibration: Adjust the calibration factor for more accurate measurements based on your environment. • Distance Setting: Set the distance to the light source for precise luminous intensity (cd) calculations. • Front/Rear Camera Selection: Choose the appropriate camera for your measurement situation. 【Technical Features】 • Support for measuring various light source types: natural light, LED, fluorescent, incandescent, etc. • Algorithm optimization for stable color temperature calculation even in low-light environments • 10-frame moving average filter for measurement stabilization • Center-weighted image analysis for accurate evaluation of main subject quality • Automatic exposure quality assessment based on histogram analysis Perfect tool for photographers, videographers, lighting designers, UI/UX developers, and anyone who needs accurate light measurements.

Added the ability to save a measurement list

Multi language support

Added features and fixed errors.

Added features and fixed errors.

Fix some bug and add functions

Fix some bug and add functions

Fix some bug and add functions

Fix some bug and add functions