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【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.","app_summary":"'Light Scope', published by a South Korea-based company. The app was last updated on 13 May 2025. Released in US on 30 June 2021 and globally on 30 June 2021. 'Light Scope' belongs to the 'Graphics & Design' category maintaining a content rating of '4+'. Last month's estimates were < 5k downloads and < $5k revenue. The app is available in Japan, South Korea, and Netherlands and being advertised actively. Sign up / Sign in to learn more about the time spent, session durations, usage & engagement (DAU, WAU, MAU), retention, churn, marketshare, growth trends, and other market statistics.","subtitle":"Light Measurement & Analysis","promo_text":"Professional light meter app for measuring illuminance (lux), luminous intensity (cd), color temperature (K), contrast ratio, and noise using your device camera"},"has_in_app_purchases":false,"installs":null,"language":"EN","support_url":"http://practical.kr","top_countries":["JP","KR","NL"],"valid_countries":["AE","AO","AR","AT","AU","AZ","BE","BF","BG","BH","BJ","BO","BR","BY","CA","CG","CH","CI","CL","CM","CN","CO","CR","CY","CZ","DE","DK","DO","DZ","EC","EE","EG","ES","FI","FR","GB","GE","GH","GR","GT","HK","HR","HU","ID","IE","IL","IN","IQ","IT","JO","JP","KE","KH","KR","KW","KZ","LA","LB","LK","LT","LU","LV","LY","MA","ML","MM","MO","MT","MX","MY","MZ","NG","NI","NL","NO","NZ","OM","PA","PE","PH","PK","PL","PT","PY","QA","RO","RS","RU","SA","SE","SG","SI","SK","SN","SV","TH","TN","TR","TW","TZ","UA","UG","US","UY","UZ","VE","VN","YE","ZA","ZM","ZW"],"available_countries":["US","AU","CA","CN","FR","DE","GB","IT","JP","KR","RU","DZ","AO","AR","AT","AZ","BH","BB","BY","BE","BM","BR","BG","CL","CO","CR","HR","CY","CZ","DK","DO","EC","EG","SV","FI","GH","GR","GT","HK","HU","IN","ID","IE","IL","KZ","KE","KW","LB","LT","LU","MO","MG","MY","MT","MX","NL","NZ","NG","NO","OM","PK","PA","PE","PH","PL","PT","QA","RO","SA","RS","SG","SK","SI","ZA","ES","LK","SE","CH","TW","TH","TN","TR","UA","AE","UY","UZ","VE","VN","BO","KH","EE","LV","NI","PY","AF","GE","IQ","LY","MA","MZ","MM","YE","BJ","BF","CM","CG","CI","JO","LA","ML","SN","TZ","UG","ZM","ZW"],"pre_order_countries":[],"website_url":"http://practical.kr","app_id":1572227924,"app_view_url":"/ios/us/byungil-park/app/light-scope-lux-meter/1572227924/","country":"US","icon_url":"https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/82/ef/3e/82ef3e6c-1210-57e4-3768-87175c6b54fb/AppIcon-0-0-1x_U007emarketing-0-11-0-sRGB-85-220.png/150x150bb.jpg","name":"Light Scope - Lux Meter","os":"ios","price":{"currency":"USD","value":299,"string_value":"$2.99","subunit_to_unit":100},"publisher_id":318781673,"publisher_name":"Byungil Park","publisher_profile_url":"/publisher/ios/318781673","rating":0.0,"rating_breakdown":[0,0,0,0,0],"rating_count":0,"country_release_date":1625036400000,"current_version":"2.0","file_size":1587200,"first_released_in":["US","AU","CA","CN","FR","DE","GB","IT","JP","KR","RU","DZ","AO","AR","AT","AZ","BH","BB","BY","BE","BM","BR","BG","CL","CO","CR","HR","CY","CZ","DK","DO","EC","EG","SV","FI","GH","GR","GT","HK","HU","IN","ID","IE","IL","KZ","KE","KW","LB","LT","LU","MO","MG","MY","MT","MX","NL","NZ","NG","NO","OM","PK","PA","PE","PH","PL","PT","QA","RO","SA","RS","SG","SK","SI","ZA","ES","LK","SE","CH","TW","TH","TN","TR","UA","AE","UY","UZ","VE","VN","BO","KH","EE","LV","NI","PY","AF","GE","IQ","LY","MA","MZ","MM","YE","BJ","BF","CM","CG","CI","JO","LA","ML","SN","TZ","UG","ZM","ZW"],"minimum_os_version":"16.6","publisher_country":"South Korea","recent_release_date":1747094400000,"release_date":1625036400000,"release_status":"WORLDWIDE_RELEASE","supported_languages":["EN","JA","KO"],"worldwide_release_date":1625011200000,"store_removal_date":null,"cohort_id":null,"worldwide_last_month_revenue":{"unit":"cent","type":"currency","currency":"USD","value":100000},"worldwide_last_month_downloads":{"unit":"unit","type":"integer","value":1000},"category_rankings":{"app_id":1572227924,"country":"US","ipad":{"top_free":null,"top_grossing":null,"top_paid":null},"iphone":{"top_free":null,"top_grossing":null,"top_paid":{"all_categories":null,"primary_categories":[{"6027":127}],"sub_categories":[]}}}}