Color & light meter for iPhone and iPad

Color meter and sun tracker.

Kelvin, tint and exposure read live through the camera you already carry, and the sun's path drawn over the same picture. Made for gaffers, cinematographers and anyone who has to match one light to another.

Download on the App Store

$19.99, once.
Included on Cutvey plans that carry it.

Cutvey Meter reading 5600 K and 14,000 lux over a hillside, with the ND strip below

One purchase

Buy it once and it is yours on every iPhone and iPad you sign into, iOS 17 and later.

Nothing leaves the phone

No advertising, no tracking. No reading, frame or location goes anywhere unless you share it yourself.

Works on location

The meter and the sun tracker need no signal. Every reading, calibration and rig stays on the device.

01   Match

Match one light to another

Pin a source with REF, point at the second one, and the card shows both readings, the difference in kelvin and in mired, and the gel that closes the gap. Not "these are 1,400 K apart" but "half CTO, plus 18 mired".

  • Pin a reference
  • Kelvin and mired delta
  • Gel recommendation
The reference card comparing a pinned light with the live reading

02   Expose

Exposure and ND calculator

The strip under the reading carries a live ND recommendation for your rig: ISO, stop, shutter and frame rate. Tap it to solve for ND, ISO, stop or shutter instead. Save a rig as your default and every job starts from it.

  • ND recommendation
  • Solve for ND, ISO, stop or shutter
  • Calibrate each lens to your reference meter
The rig sheet solving for ND

03   Plan

See where the sun will be

The sun tracker keeps the camera exactly where it is and lays the sun's path over the live view, with hour markers, a compass ribbon and the horizon. Drag the scrubber and the sun walks its path, so you can see the four o'clock light while you are standing on the location.

  • The sun path laid over the live view
  • Sunrise, noon and sunset, with bearings
  • Golden and blue hour, today and two more dates
The sun's path drawn over a hillside with hour markers

04   Keep

Every reading keeps its frame

LOG saves the reading with the frame you were pointing at. They collect as a contact sheet, newest first. Compare any two, share one with its frame, and every reading remembers the device, the lens and the exposure you had on.

  • Log and store in the library
  • Compare any two
  • Share with the frame
The library of logged readings with their frames

It tells you when not to trust it

A confident wrong number is the one thing it will not show you.

HIGH, MEDIUM and LOW say how settled the reading is. DIFFICULT SOURCE means the light is spiky, the kind of cheap LED or fluorescent no camera can pin down, and the app says so instead of guessing. This is a camera used as a meter, not a spectrometer: for continuous sources it is close, and for spiky ones it tells you.

On iPad as well

The picture takes the whole display and the instrument stands beside it.

Same meter, same numbers, same library. Bought once, it unlocks on both.

Cutvey Meter on an iPad, the readout standing beside a full-width picture

Unlock forever

$19.99once

The whole app, forever. One payment, no subscription, no upgrades to buy later. Restores on any iPhone or iPad running iOS 17 or later and signed into the same Apple Account.

Download on the App Store

Already on Cutvey?

Included with your workspace membership.

Cutvey Meter is part of the Cutvey production toolkit. Members of a workspace on a plan that carries it sign in with their email and a one-time code, on up to three devices, and the app unlocks with nothing to buy.

About Cutvey