FishRuler: Fish Size Measure

Left the tape measure at home? Point your iPhone at your catch, tap nose and tail, and read the length in centimeters. Uses the LiDAR scanner on Pro models.

You landed the fish. Now how long is it?

Reaching for a tape measure with wet hands, holding a thrashing fish flat, keeping the tape straight — it never works the way it should, and the fish is losing time out of the water while you fumble.

FishRuler turns your iPhone into the measuring tool you actually have with you. Point the camera at your catch, tap the nose, tap the tail, and the length appears on screen in centimeters. That's the whole app.

HOW IT WORKS • Tap two points — nose and tail — and read the distance between them • Missed the spot? Drag either marker to fine-tune without starting over • A line is drawn between the two points so you can see exactly what was measured • One tap on Reset and you're ready for the next fish

WHY ANGLERS LIKE IT • Nothing to unroll, nothing to hold flat, nothing to lose overboard • Fast enough to measure and release quickly • Works fully offline — no signal needed at the lake, river or jetty • No account, no sign-up, no data collected • Useful beyond fish, too: measure gear, coolers, boat fittings or anything else in front of you

BEFORE YOU BUY — DEVICE REQUIREMENT FishRuler measures using the LiDAR scanner, so it needs an iPhone that has one — iPhone 12 Pro / Pro Max or later Pro models. On a device without a LiDAR scanner the app will tell you it cannot measure. Please check your model before purchasing.

ABOUT ACCURACY Readings are real-world estimates produced by the device's depth sensor. Good light, a steady hand and a fish lying flat give the best results. Treat the number as a practical field measurement — for tournament rules, legal size limits or official record submissions, always confirm with the measuring device that the rules require.

One purchase. No subscription, no ads.