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.
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, one free AI plan a day, or unlimited with Pro.
Claude Vision recognises the fish and suggests weight and length from the photo. 3 free IDs a day, or unlimited with Pro.
Search by town. Real named lakes, rivers, canals and reservoirs from OpenStreetMap, over 500,000 across the US & UK.
Tide times, river levels, weather, pressure and moon for your spot, with the weekend ahead on your home screen.
Personal bests by species. Best month. What's biting where. Season vs year vs all-time.
Close seasons, bass rules and what you can keep, with a reminder before your rod licence runs out.
Your log is yours. Nothing is shared unless you send a catch picture to your own socials.
Every screen designed to be read at a glance on a damp bank, not pored over at a desk.
Tides, river level, moon
Best windows and tactics
Bests, totals and trends
Licence, seasons, keep rules
In the UK: tide times from the Hydrographic Office, Environment Agency river levels, close seasons and a rod licence reminder. In the US: USGS river gauges and half a million named waters. Built by anglers who fish here, in the units you actually use.
3 photo IDs and 1 trip plan a day on the house. No card, no trial timer. Go Pro when you want them unlimited.
Yes. CastLog is free to download and includes catch logging, your private diary, personal bests, stats, tides, river levels and the weekend outlook, plus 3 free AI fish identifications and 1 free AI trip plan every day. CastLog Pro makes the identifications and trip plans unlimited.
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. Nothing is shared unless you share a catch picture yourself, and we do not sell your data.
CastLog Pro is £4.99/month or £39.99/year, with a 7-day free trial. It removes the daily limits: unlimited AI fish identifications and unlimited AI trip plans with tackle lists. Catch logging, stats, personal bests, tides and river levels stay free.
Yes. CastLog shows whether the river coarse close season is on, the current bass rules and what you may keep, and can remind you before your rod licence runs out. Venue rules and regional byelaws can be stricter, so check those too.
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. Sign in with Apple or email and your catch journal, stats and saved trip plans are kept in your account, so they follow you to a new iPhone or iPad.
Join anglers across the US and UK logging catches with CastLog. Free to download, 3 AI identifications a day on the house, no card required.