Telemetra • The Rangefinder

The first computational rangefinder. Point at a distant target, step to the side, and read the distance, with a ± that tells you how much to trust it.

Telemetra measures the distance to almost anything you can see. A wall across the room. A building down the street. The far side of a valley.

Point your iPhone and tap. Step a couple of feet to the side, keeping the target in frame. The distance appears, with a ± beside it that tells you how much to trust the reading. Keep moving and it gets surer.

No laser. No LiDAR. No reflective target. The camera watches the spot you tapped while the phone tracks its own motion through space, and the two triangulate the distance, the way your eyes read depth from two angles at once. It all happens on the phone. Nothing leaves your device.

Because there is no LiDAR, it runs on any iPhone, not only the Pro models.

The ± is the part other rangefinders leave out. Telemetra would rather tell you it isn't sure than hand you a number it hasn't earned. The reading tightens as the instrument grows more certain, and freezes once it has earned the figure.

Texture is what it reads: brick, rock, bark, signage, foliage. Aim at something with detail and the lock is quick and tight. Aim at blank sky or a mirror and the ± widens to tell you so.

For anyone who has needed the distance to something out of reach: hikers judging a ridgeline, builders sizing a span, anglers reading the far bank, scouts and sailors and the plain curious.

It is the first computational rangefinder. Point at something far off and see for yourself.

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