CameraTestSlate

CameraTestSlate turns your iPhone®, iPad®, or Mac® into a wireless data slate so you can update on-camera test info from behind the camera. Info resizes to fit the space available. CameraTestSlate is color-balanced for 3200 K, 4300K, 5600 K, or 6500 K (and can show that color temperature onscreen), and you can choose light or dark mode slates.

Completely free. No in-app purchases; no tracking; no data collection.