Lux Meter – Light Meter
Alper Sumer Guc · Utilities
Independent analytics for this App Store listing. AppTracker is not affiliated with Alper Sumer Guc.
Chart standing · US
What changed · US
Listing changes AppTracker has observed for this app in this storefront — new versions, price moves, rating shifts, and store copy.
• Faster start: Lux Meter now opens instantly, and the camera is ready in a fraction of a second. • New launch screen. • Spot metering is selected on first launch, and the app remembers whether you last used Spot or Average. • Various refinements and fixes.
Price & rating history · US
Reconstructed from the listing changes AppTracker has observed in this storefront. A field is charted once it has changed more than once, and each line starts at the value it moved from.
Average rating · ★ 4.40 now · 4 changes on record
Ratings breakdown · US
The star breakdown behind this app's rating in this storefront.
In-app purchases · US
No in-app purchases.
Screenshots
About
Lux Meter turns your iPhone into a professional light meter. Using your camera and the ISO 2720 photographic standard, it measures illuminance in lux and foot-candles in real time — accurately, fully offline, with no ads and no sign-up. Whether you're setting up studio lighting, checking your desk for eye comfort, dialing in grow lights for plants, or metering a film scene, Lux Meter gives you the numbers the pros rely on. MEASURE • Real-time lux and foot-candle readout (tap to switch units) • Exposure Value (EV) at your chosen ISO • Color temperature (CCT in Kelvin) estimate from the camera • Live camera preview with a center spot reticle • Spot metering (center) or average metering (whole frame) • Min / max / average statistics with a live chart • Hold to lock a reading • Plain-language light labels (Office lighting, Overcast day, Direct sunlight…) • Low-light path reads down to sub-1 lux EXPOSURE CALCULATOR (2-in-1) • Set any two of aperture / shutter / ISO — it solves the third • Cinema mode: frame-rate and shutter-angle presets, plus the 180° rule • ND filter and exposure compensation • Sunny 16 helper and a depth-of-field estimate TARGETS & PRESETS • Use-case presets: Reading, Office/Ergonomics, Photography, Film/Video, Plants & Greenhouse, Aquarium/Terrarium • Set a target lux band and get a subtle alert when the light is in range • Optional haptic and audio meter tick that speeds up as light increases CALIBRATION YOU CAN TRUST • Independent calibration for front and back cameras • Multi-point calibration fitted across the whole range • See raw and calibrated values side by side • Reset to default anytime SAVE & EXPORT • Save single readings or record a session over time • Min/max/average per session, notes and optional location tag • History list with rename, delete and CSV export (share sheet) BUILT RIGHT • Works 100% offline — no account, no tracking, no network • No ads, nothing locked behind a paywall • Grid and histogram overlays, screen-brightness pin, keep-awake • Clean dark-first design, light mode too • 8 languages with instant in-app switching A note on accuracy: iOS does not give apps access to the ambient light sensor, so Lux Meter uses camera-based reflective metering (ISO 2720). For best results, calibrate once against a reference and use the same lighting conditions. Measure light like a pro. Download Lux Meter.
What's new · 1.2.3
• Faster start: Lux Meter now opens instantly, and the camera is ready in a fraction of a second. • New launch screen. • Spot metering is selected on first launch, and the app remembers whether you last used Spot or Average. • Various refinements and fixes.
Details