Switch to Manual to mark the band yourself.
Get your band or tag in the shot, at the same distance from the camera as the fish.
Hopper measures the fish in your photo.
Wear the bracelet, or clip the tag to your net, pack, or lanyard.
Then take the picture you’d take anyway.
That’s the whole thing. Hopper knows exactly how long your band is, finds it in the shot, and measures the fish against it.
No ruler. No lining anything up. No holding the fish a certain way.
Every catch lands in your log with its length, species and date — numbered in the order you caught it.
The bracelet and the tag are woven to an exact length. That length is what makes the measurement possible.
No bracelet detected
The band is what drives Hopper's measurement, and we couldn't spot it in this photo. Want me to estimate the size and species from other cues in the shot instead? It'll be a rougher guess than a bracelet read.
These are the true lengths the measurement is built on. Change a number here and every angler picks it up next time they open the app — no redeploy.