KelvinCam is a light meter app for iPhone and iPad. It reads color temperature, exposure and lux live through the camera, so white balance is right before you shoot, not after. Free to download, with one optional Pro purchase.
No subscription · iPhone and iPad · iOS 18 or later · ready for iOS 27
Rivot Labs is a one-person iOS studio. We build small, opinionated apps for people who'd rather get on with their day than spend it inside an interface.
That means native Swift, careful defaults, and as few features as we can get away with. Our apps have no ads, no accounts and no tracking across other apps, and whatever can work offline, does.
Reads the color temperature, exposure and brightness of any scene in real time, then suggests the shutter, aperture and ISO to set. White balance right before you shoot, not after.
We write to a small list when an app ships, a TestFlight opens, or we learn something worth sharing. Written by a human, no tracking. To join, email us with “Subscribe” in the subject; reply “Unsubscribe” any time to leave.