Grainmeter: Film Light Meter

Grainmeter is a light meter for the camera in your other hand. Point your iPhone at the scene and read the aperture and shutter speed for the film you've loaded. It doesn't take the picture: you set the two numbers on your film camera and shoot with that. Two scales slide against each other, like the calculator dial on an old meter. Every aperture sits above the shutter speed that gives the same exposure, so you see at a glance whether f/8 at 1/125 or f/2.8 at 1/1000 suits the picture. Drag to choose. When the light changes, the shutter scale moves. Free, for any camera without a working meter • Average metering through the iPhone camera, at any ISO from 6 to 25600. • Wait for Steady, then read. Hold freezes the reading, and so do the volume buttons and Camera Control. • Tap EV for exposure compensation: +1 for snow or a backlit face. • Set your camera's widest and smallest aperture, fastest speed and longest marked time. What it can't set is greyed out, and past the dial Grainmeter tells you to use B. • Full, half or third stops, with the numbers engraved on real lenses and dials. Long times read 2″ and 1′20″, never as fractions. • Calibration matches Grainmeter to a meter you trust. A Sunny 16 table covers the moments without a camera. • Open the meter from Control Center, the Lock Screen or the Action button, and on iPhone 16 and later with Camera Control, without unlocking. Grainmeter Pro, one purchase • Film profiles: over 30 black and white, colour negative, slide and cine films, with box speed, push and pull. • Reciprocity: long exposures corrected with the makers' own data. When a maker publishes nothing, Grainmeter says so instead of guessing. The B timer keeps counting on the Lock Screen and in the Dynamic Island, and tells you when to close the shutter. • Spot and multi-spot: a 4° circle you drag onto a face or a shadow. Add spots on the highlights and shadows to see how many stops apart they are, then expose for the middle. • Saved cameras: every body you shoot, each with its own apertures and speeds. • Filters: ND up to 15 stops, yellow, orange, red, green, polarizer and conversion filters, plus a bellows calculator for close-ups. • Logbook: one tap writes down the frame, the pair, the film, the light and, if you want, the place. A frame counter per roll and CSV export. On iPhone Duo Unfolded, the image and the meter sit on either side of the fold. Stand it half-folded on a table for a long exposure: the image stays above the crease, the readout and timer below it. Night mode turns everything red so your eyes stay used to the dark. In English, Japanese, German, French, Korean, Chinese, Italian, Spanish and Turkish. No subscription, no ads, no account. Nothing you do leaves your iPhone.