Aperture
f/2
getkelvo.app
The future of light metering is on the way.
Point your phone at the scene, describe the shot you want, and Kelvo tells you the exact aperture, shutter speed, ISO and white balance for your camera and lens.
Coming soonApp Store
Coming soonGoogle Play
Scene metered
Golden hour portrait
12 EV
Shutter
1/1000
ISO
100
White balance3500 K
“Warm, dreamy portrait with a soft background.”
How it works
Three taps from scene to settings.
01 — Meter
Snap the scene
Take a photo with your phone, pointed where your camera will point. Kelvo reads the exposure data to measure the light.
02 — Describe
Tell it the vibe
Type what you're going for in your own words, or tap options for subject, motion, background blur and mood.
03 — Shoot
Dial it in
Get aperture, shutter, ISO and white balance tuned to your exact camera and lens, with tips for the shot.
Built for your gear
A light meter that knows your camera.
Generic meters give you one answer. Kelvo works inside the limits of the body and glass you actually own.
Find your camera
Search 160+ bodies from Canon, Sony, Nikon, Fujifilm and more. Kelvo fills in sensor size, shutter limits, ISO range and stabilization for you.
Full frame · APS-C · Micro Four Thirds · GFX · 1-inch
Pair any lens
Add your zooms and primes once, then swap them between cameras. Settings respect your widest aperture at every focal length.
24–70mm f/2.8 · 50mm f/1.8 · 70–200mm f/4
Photo and video
Switch to video and Kelvo plans around frame rate and the 180° shutter rule, and tells you when you need an ND filter.
24p → 1/50 s · ND8 · ND64 · variable ND
Private by design
No account, no tracking, no ads. Scene photos are measured on your phone and never uploaded or saved.
On-device metering · nothing leaves your phone
Launching soon
Stop guessing. Start metering.
Kelvo is in final testing for iPhone and Android. Start free, or go Pro for unlimited exposures, shot history and advanced video.
Coming soonApp Store
Coming soonGoogle Play