FishRuler: Fish Size MeasureFishRuler: Fish Size Measure
Forgot your tape measure? No problem. Just point your iPhone at your catch, tap the nose and the tail, and get the length in cm — AR fish measuring made simple.
Download on the App Store
Screenshots
Features
Tap the nose, tap the tail
Aim the camera at your fish, tap once at the nose and once at the tail. The distance between the two points shows up on screen in centimeters. No rewinding a tape, no fighting to keep it straight.
Off by a bit? Just drag it
If a tap lands slightly off, drag the marker to nudge it into place — no need to start over. A line connects the two points, so you can see exactly what you measured at a glance.
Measure and release fast
Hit Reset and the measurement clears, ready for the next fish. Since you're not wrestling the fish flat against a board, it spends less time out of the water.
Works completely offline
Use it on the rocks, up a creek, out on a jetty, or offshore on the boat — anywhere with no signal. No account, no sign-up, and nothing ever leaves your phone.
Not just for fish
Measure rods, tackle, coolers, boat hardware — whatever is in front of you. Handy well beyond the water any time you need a quick length.
One-time purchase, no ads
Buy it once and it's yours. No subscription, no add-on purchases, no ads. And no data collection of any kind.
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.