Snap the fish and CastLog identifies the species, estimates weight and length, and logs the spot, weather and conditions — the moment you take the photo. Every catch in a private journal, with personal bests and season stats.
Just a photo and a tap. CastLog does the identifying, measuring and record-keeping while you keep fishing.
Take the photo. Location, water temperature, air pressure and weather attach themselves automatically.
Claude Vision recognises the species and estimates weight and length straight from your picture — with field notes.
It lands in your private journal, updates your personal bests and feeds your season stats. Share only when you want to.
Point CastLog at your catch and Claude Vision reads the scales, fins and body profile to name the species — then estimates the weight and length from the photo alone. Confident enough to back itself, honest enough to show you the runners-up.
Computer-vision sizing, no scales or tape needed bankside.
Why it's that species, and how to tell it from look-alikes.
Tuned for UK coarse, carp and sea species — not a generic global guesser.
Confirmed by the highly irregular, large scattered scales arranged in patches along the lateral line — the defining feature distinguishing it from the fully-scaled Common Carp.
Claude Vision recognises the fish and suggests weight and length from the photo. Five free IDs, then Pro.
Search by town. Real named lakes, rivers, canals and reservoirs from OpenStreetMap — over 50,000 of them.
Weather, water temperature, moon phase and river levels — auto-attached to every catch.
Personal bests by species. Best month. What's biting where. Season vs year vs all-time.
Knows the UK river coarse close (15 Mar – 15 Jun). Shows you what's still open nearby.
Your log is yours. Share a catch to the community feed only when you want to.
Every screen designed to be read at a glance on a damp bank, not pored over at a desk.
Bests, totals & trends
Share when you want
What's working where
Tuned to your region
CastLog respects the river coarse close season, knows your local stillwaters, and talks in pounds and ounces. The kind of detail only an app built by anglers who fish here gets right.
Five AI identifications on the house — no card, no trial timer. Upgrade for the full field-guide experience.
Join UK anglers testing CastLog before public launch. We'll send your TestFlight invite the moment a spot opens.