✓ / ✗ says whether each line matches what you see. Verdicts are kept on your Mac.
Counterweight
A viewfinder that reads the picture instead of drawing a grid on it.
Squint sorts the scene into 2, 3 or 5 values, the way a painter squints; the slider sets how hard. Drag ⇆ to compare with the photo. The bar on top is the tonal plan.
The beam tips toward the heavy side. Level it for calm, tip it for tension.
Two circles and a beam show the main weight and the small counterweight balancing it. Tap the counterweight to cover it and watch the picture tip.
Colour finds different colours sitting at the same value, which merge when you squint.
The shutter reads the frame and suggests crops, in your frame's shape or a canvas format, each with a receipt.
Tap the background if light and dark come out the wrong way round.
Prototype. Runs on this device; verdicts go only to your own Mac.
Prototype. Everything runs on your phone; no picture leaves it.