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.
Bass, carp, pike, trout, panfish and more — 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.
Pick the water and the day — CastLog does the rest. It reads your log and the live forecast to build a complete trip plan: which species to target, the bait, rig and method for each, a pack-and-buy list, and the exact dawn and dusk windows when the fish will feed.
Bait, method and rig for each fish — in the order worth trying.
Everything to grab before you go, tickable on the bank.
Dawn, dusk and moon phase from the forecast for your chosen day.
Plan it yourself for free, or let CastLog AI build it — five free AI plans, then Pro.
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 500,000 across the US & UK.
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 season and regional rules, so you always know what's open near you.
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
Share a catch to the CastLog feed and see what's landing — from UK stillwaters, rivers and canals to US lakes, ponds and creeks. Built by anglers who fish here, in the units you actually use.
Five AI identifications on the house — no card, no trial timer. Upgrade for the full field-guide experience.
Yes — CastLog is free to download and includes catch logging, your private diary, stats, the community feed, plus a set of free AI fish identifications and free AI trip plans to get started. CastLog Pro unlocks unlimited AI identifications and the full AI Trip Planner.
Photograph your catch and CastLog uses Claude Vision to read the fins, scales and body profile, name the species, and estimate its weight and length from the photo alone — then saves it to your journal with the conditions.
Yes. CastLog covers 500,000+ named fishing waters across the United States and United Kingdom — rivers, lakes, reservoirs, canals and the coast — and is tuned for US and UK species like bass, carp, pike, trout and panfish.
Pick a water and a day and CastLog builds a full session plan: the best bite windows (dawn, dusk and moon phase), ranked tactics with bait, method and rig for each species, a pack-and-buy tackle list, and a conditions outlook — all from your log and the live forecast.
No. You can log catches offline at the water with no signal, and CastLog syncs automatically when you are back in range.
Your catches, photos and notes are yours. Photos are only sent for AI identification when you tap Identify, and are never used to train models. You choose what to share to the community feed, and we do not sell your data.
CastLog Pro is £4.99/month or £39.99/year, with a 7-day free trial. It unlocks unlimited AI identifications, unlimited AI trip plans and tackle lists, the full species library and field notes, catch trends and auto personal bests, and sync across iPhone, iPad and web.
Yes. CastLog knows the UK river coarse close season and regional rules, so you always know what is open near you before you plan a session.
Yes. Location, water temperature, air pressure, weather and moon phase all attach themselves automatically the moment you log a catch — no manual entry needed.
Yes. Every catch feeds your private journal, which tracks personal bests by species, your best month, what is biting where, and season-vs-year-vs-all-time stats.
Yes, with CastLog Pro. Your catch journal, stats and trip plans sync across iPhone, iPad and the web, so your log is always up to date wherever you check it.
Join anglers across the US and UK logging catches with CastLog. Free to download — five AI identifications on the house, no card required.