LightTemp vs mySpotMeter

LightTemp turns your smartphone into a professional on-set tool: measure light, understand it, and keep it consistent across the whole shoot – no expensive hardware required. Built by a filmmaker, for filmmakers. ◆ REAL-TIME KELVIN & TINT Point your camera at a light source and instantly read color temperature (Kelvin) and green-magenta tint. Tap the image to measure that exact spot (double-tap = center). Perfect for scouting and quick lighting checks. ◆ CAMERA WB RECOMMENDATION LightTemp tells you exactly what to dial into your camera – the measured value IS your white balance. ◆ LIGHTING RATIO (LIGHTING DESIGN) Measure Key, Fill, Back and Background one by one – the app computes the contrast ratios in stops (e.g. 4:1). Turn "reading a number" into "designing your lighting". ◆ GEL CALCULATOR Pick source + target white point – the app calculates the right CTO/CTB gel using real mired math, including combining large corrections. ◆ SHOOT SETUP & SHOT MATCH (CONTINUITY) Set your cine camera once (model, EI, fps, shutter angle). Save each scene as a full snapshot – Kelvin, tint, lighting ratio, flicker note and your camera values – and reproduce the lighting exactly on the next shooting day. Export as PDF. ◆ CONTINUITY RADAR Anchor the current light and the app warns you – with a banner and haptic – the moment color temperature or tint drifts, with a correction tip to get back. Keeps your look consistent across takes. ◆ MULTI-POINT DEVICE CALIBRATION Calibrate LightTemp with several reference points into a precise correction curve – maximum accuracy on your exact device. ◆ AUTOMATIC LIGHT SOURCE DETECTION Recognizes Tungsten, LED, HMI, daylight, candlelight or fluorescent – including a flicker warning (banding risk). ◆ PRO SCOPES • Histogram – brightness distribution • Waveform – luminance across the image width • RGB Parade – red/green/blue separately for a quick white-balance check ◆ FALSE COLOR & ZEBRA Exposure overlays like on professional monitors – correct skin tones, clipping and overexposed areas at a glance. Plus a live exposure assistant. ◆ GOLDEN & BLUE HOUR Calculates the sun's position from your location with a countdown to the next phase – for scouting. ◆ MORE TOOLS • Live camera data: ISO, shutter, aperture, FPS • Pinch-to-zoom • Freeze to lock the value • Customizable tool bar • Kelvin alarm (vibrates at target value) • Four languages: English, German, French, Spanish PRIVACY All data stays on your device. No accounts, no tracking, no ads. Note: Accuracy depends on your device's camera; use the calibration for best results. LightTemp is an assistive tool and does not replace a calibrated hardware light meter for the most demanding use.

Designed by a photographer, for photographers. Built with one clear goal: precise spot metering for photographers who want full control over exposure. mySpotMeter turns your iPhone into a dedicated spot meter with selectable 1°, 2° and 4° measuring angles. Whether you shoot film or digital, you can isolate specific areas, evaluate contrast and place your exposure with confidence. Key Features • Selectable 1°, 2° and 4° spot metering angles • Dedicated readings for shadows, highlights and middle gray • Aperture or shutter speed priority • Average readings mode • Store and compare measurements directly on the exposure scale • Clear EV difference between your target and the current reading • Instant aperture calculation based on the selected ISO and shutter speed • Shutter speed range from 240 seconds to 1/8000s • Aperture range from f/1.0 to f/128 • ISO range from 3 to 409.6K • Exposure settings in 1/3 or 1/2-stop increments • Measure using the on-screen control or the iPhone volume buttons • Automatic calibration and precise manual EV adjustment • Filter factor correction up to FF1000 Built for Deliberate Exposure Instead of averaging the entire scene, mySpotMeter lets you measure only the area that matters. Compare shadows and highlights, understand the available contrast and decide exactly where to place your exposure before pressing the shutter. Download the User Manual You can view or download the complete user manual before purchasing or downloading the app. Scroll to the Information section of this App Store page and tap Developer Website. About This app is built and maintained by an independent photographer and developer. It is a focused photographic tool, continuously refined through real-world use. If you have suggestions or need help, feel free to contact me: davidquiles@me.com