LightMeter Pro vs Light Meter・Lux Meter

LightMeter Pro turns your iPhone into a professional light meter — for photographers, filmmakers, and plant growers alike. PRECISE LIGHT MEASUREMENT - Real-time Lux, Foot-candle, and EV readings from your camera sensor - Color temperature in Kelvin with visual warm/cool bar - Continuous metering with smooth, responsive updates FULL MANUAL CONTROL - Set ISO, shutter speed, and aperture manually — just like a Sekonic or Gossen - Lock any parameter and let the others auto-adjust - Standard photography stops for all three values - Tap to switch between front and rear camera PLANT & GROW LIGHT MODE - Switch to Plant mode for PPFD readings (µmol/m²/s) - DLI (Daily Light Integral) calculator for optimal plant growth - Light source presets: LED, HPS, Fluorescent, Sunlight - Adjustable photoperiod (4-24h) for accurate DLI AI SCENE ANALYSIS - Point your camera at any scene and get instant lighting analysis - AI identifies scene type, lighting quality, and mood - Actionable recommendations to improve your setup - 10 scenario presets: Portrait, Product, Interview, Cinematic, and more DESIGNED FOR PROFESSIONALS - Live camera viewfinder with overlay controls - Premium dark interface — built for on-set use - Haptic feedback on every interaction - No ads. No clutter. Just precision. SUBSCRIPTION - 3 free AI scans per day - Pro unlocks unlimited AI analysis, manual shutter & aperture control - Weekly, annual, and lifetime plans available Perfect for photographers, DPs, gaffers, content creators, interior designers, plant parents, and anyone who works with light. AI & DATA PRIVACY AI Scene Analysis uses Anthropic's Claude technology. When you use this feature, your photo is sent securely to Anthropic's servers for processing. Images are not stored after analysis. No personal data is collected or shared. See our privacy policy for details. Privacy Policy: https://www.easytech-agency.net/privacy/lightmeter_pro Terms of Use: https://www.easytech-agency.net/terms

LUX METER — LIGHT LEVELS IN LUX AND FOOT-CANDLES Lux Meter is a camera-based light meter for illuminance. Aim the rear camera at a surface and read the level in lux and foot-candles, plus EV at ISO 100 — desk lighting, a grow light over houseplants, a scene for an analog camera. WHY THE NUMBER IS WORTH TRUSTING ▸ Metering method always on screen: Reflected · Point AE or Reflected · Center. ▸ Readiness comes from a 1.2-second EV window: 6 valid samples over 650 ms within a 0.16 EV spread to lock, then a 0.28 EV hysteresis against flicker. ▸ No fresh frame for 2 seconds reads Stale; unusable metadata reads Error. ▸ Moving the target, changing zoom or lens, returning from background or recalibrating restarts the window. ▸ Nothing saves or samples until the reading is valid and stable. ROOM AND WORKPLACE LIGHT LEVELS Pick the space or task, then run the five-point survey: five samples across the working plane, each held until stable, giving average, minimum, target range, observed min/average uniformity and the sampling grid. 15 practical targets in 5 groups: general office 300–500 lx, detailed office work 500–750, precision factory 750–1000, warehouse and hospital ward 100–200, corridor 100–150, classroom 300–500, library 500+, operating room 1000+, bedroom 50–150, plus kitchen, bathroom, garage, retail floor and restaurant — practical guidance, never legal certification. GROW LIGHTS, PPFD AND DLI FOR PLANTS Measure at the leaf plane of one plant and decide for that plant: pick the plant, the light source and the photoperiod, and the reading becomes a PPFD and DLI estimate in mol/m²/day. 16 plants carry daily targets: pothos and snake plant 2–4, ZZ plant 1–3, peace lily 3–6, monstera and philodendron 4–8, fern 4–7, rubber plant 5–10, fiddle leaf fig 8–12, plus bird of paradise, succulent, herbs, tomato, pepper, lettuce and strawberry. 5 light sources: sunlight, white LED, fluorescent, HPS, metal halide. The sample log marks periods it did not cover, so a thin number never passes for a full day. EXPOSURE FOR PHOTO AND VIDEO The same reading solves exposure: aperture priority, shutter priority and manual across f/1.0–f/64, 1/8000 s–60 s and ISO 25–12800 in full, ½ or ⅓ stops. Each solution gives the exact result, the nearest setting your gear really has and the residual error in stops — out of range, by how many. Manual shows Over / Matched / Under on a ±3-stop scale, and Cine turns FPS, shutter angle, ISO/EI and ND into an equivalent shutter and f-number. RECORDS AND CSV EXPORT Readings, surveys, DLI estimates, comparisons and monitoring all land in one history list — each with its method, readiness state, calibration and mode inputs. Page the archive, export to CSV. ALSO INSIDE ▸ Lock a reading; switch lux ↔ foot-candles in one tap ▸ Lux reference — 16 environments, 0.1 lx full moon to 130,000 lx direct sun ▸ EV reference — 11 scenes, −6 EV starlight to +18 EV snow ▸ A/B comparison — capture A, move to B, get the EV difference and brightness ratio ▸ Continuous monitoring — min / avg / max trend, real sampling interval, samples and missed samples, markers; background time logs as a gap ▸ Guided calibration — enter a reference value, aim at a uniform surface, wait for stable, apply the offset LIMITS AND PRIVACY A reflected-light estimate from camera exposure metadata — not an incident meter, not a PAR sensor, not a certified laboratory instrument — so it depends on the surface you aim at. The camera only measures light: no photos taken or stored, nothing uploaded, no account, and readings leave your device only in a CSV you export. Free covers the live reading and its readiness state; Pro removes ads and unlocks every workflow. Point, wait for stable, read the number — and stop guessing how much light really reaches that desk or that leaf. Terms of Use: https://zeroplay.io/docs/legal/terms-of-service Privacy Policy: https://zeroplay.io/docs/legal/privacy-policy