Know when
the fish
will bite.
CAST reads the tide, the moon and the pressure at your exact mark and tells you the hours worth fishing. Then it identifies the catch, logs it, and keeps the record. Rivals charge eighty dollars a year for that forecast; ours is deterministic maths on public data, so it's free.
- 235k+
- Named waters
- 10 days
- Bite forecast
- 43
- Species in the key
- £0
- For the intel
The intel other apps
charge you for.
Solunar majors and minors, tide extremes, pressure trend and a ten-day outlook — pinned to your mark, refreshed by the hour. It's astronomy and public data, so it costs nothing here. Pro sells the analysis on top, never the numbers underneath.
Check today's windows
- Majors and minors from real moon transits — not a generic day rating
- Tide extremes and height, wherever the water is tidal
- Pressure trend read as feeding behaviour, not just a number
- Seven days out, so you can book the right morning off
Name any fish
in six field marks.
Photograph the catch, or answer six questions — water, body shape, fins, markings, mouth, size. The key narrows 43 species the way a naturalist would, and shows its working at every step. A taxonomic key, not a black box.
- Habitat
- Coastal
- Typical
- 40–70 cm
- Bait
- Peeler crab
- Best
- Flooding tide
- Min size
- 42 cm
- Bag
- 2 / day
Post it to Community ID and let other anglers weigh in. Suggestions are ranked, and the accepted answer writes straight back into your logbook.
Every shore, bank
and pier — tapped.
More than 235,000 named waters across Britain, Europe and North America — and then the map, which doesn't stop there. It reads the coastline, lake shores, river banks, piers and slipways around you and puts a fishable mark on every one, named or not. Tap any of them for the live score, the rules, and every fish that swims there.
Open the map
| № | Mark | Targets | Score |
|---|---|---|---|
| 01 | Chesil Beach Dorset | Bass · Bream · Plaice | 88 |
| 02 | Portland Bill Dorset | Wrasse · Pollock · Tope | 84 |
| 03 | Babbacombe Beach Devon | Wrasse · Mackerel · Garfish | 82 |
| 04 | Brixham Breakwater Devon | Pollock · Conger · Whiting | 79 |
| 05 | Hurst Spit Hampshire | Smoothhound · Ray · Bass | 76 |
Every fish, filed
and remembered.
Length, weight, species, rarity, spot, weather and tide — stamped onto the entry the moment you log it. The Trophy Room ranks your personal bests, the Species Dex tracks what you've still to catch, and your stats show which hours actually produce.
Open the logbook
Trophy Room
Personal bests by species, tiered common through mythic.
Species Dex
Regional collections with completion rings and locked slots.
Angler Intelligence
Your golden hours, moon phases and spot affinities, mined from your own log.
Fish together,
even apart.
Start a live session and invite your crew — shared catches roll up into one running tally. Post the good ones to the feed, enter a tournament, and chase the daily and weekly quests for XP.
Meet the crew
Live sessions
One timer, one weather snapshot, everyone's catches in it.
Crew & follows
Follow anglers, compare logs, keep private spots private.
Tournaments
Hosted contests with live standings and entries from your log.
Quests & XP
Daily, weekly and monthly challenges that keep you sharp.
Ask it anything.
It shows its working.
Not a chatbot guessing at fishing. Every answer is computed from the live conditions at your mark, the species playbooks, your own catch log and the local rules — and every answer tells you which of those it used. It costs nothing to run, works with no signal, and it will never invent a bag limit.
Ask the coach"Why am I not catching?"
Reads the pressure, wind, tide, sky and moon against each other, then gives you three concrete changes.
"What should I target?"
Ranks every species at your mark by what's feeding right now — season, light, tide, pressure.
"When should I go?"
Today's majors and minors, and the strongest day in the next ten.
"What bait for bass?"
The playbook order, plus the one adjustment today's conditions call for.
"Can I keep a bass?"
Size, bag limit and closed season for exactly where you're standing.
"When do I catch most?"
Your own golden hours and moon phases, mined from your log — with the receipts.
No language model, no hallucinated regulations, no per-question cost passed back to you.
Twenty-five screens,
no mock-ups.
Every image on this page is a capture of the shipping app at 1170 × 2532 — same components, same type, same data model. Nothing here is a rendering of something we intend to build.
One companion,
every cast.
Thirty-six tools that all read from the same log, the same water and the same conditions — so the app gets sharper the more you fish.
Read the water
The free half — and the reason CAST exists.
Solunar calendar
Majors and minors from real moon transits.
Tides
Extremes, height and direction at your mark.
10-day forecast
Wind, temp, cloud and a daily rating.
Bite forecast
Next 24 hours, hour by hour.
Week ahead
Pick the right morning, days in advance.
Pressure trend
Falling, steady or rising — read as feeding.
Name the fish
From a photo, or from the fish in your hand.
Photo ID
Snap it and let recognition name the species.
FishKey
Six field marks, 43 species, pure taxonomy.
Species pages
Habitat, size, season, bait and method.
Community ID
Stuck? Let other anglers weigh in.
Species Dex
Regional collections and completion rings.
Catch Doctor
Why they aren't biting, and what to change.
Find the water
Named marks, and everything between them.
235,000+ spots
Named waters plus unlimited map marks.
Explore map
A mark on every shore, bank, pier and slipway.
Catch heatmap
Where fish are actually being landed.
Waypoints
Drop your own marks, private to you.
Local rules
Size, bag, season and licence at that mark.
Fish Radar
What's worth targeting here, right now.
Work the session
The screens you actually open on the rocks.
Live sessions
Timer, conditions snapshot and crew.
Live tactics
A read of right now at this exact mark.
Rig guides
Diagrammed rigs for the ground you're on.
Knot library
Step-by-step, illustrated.
Tackle box
Rods, reels and line, tracked.
Directions
Turn-by-turn to the mark you picked.
Keep the record
Your log, your bests, your patterns.
Catch log
Photo, length, weight, spot and conditions.
Trophy Room
Personal bests, ranked by rarity tier.
Catch map
Every pin, a place you've landed something.
Angler Intelligence
Your golden hours and spot affinities.
Achievements
Streaks, badges and XP that mean something.
Catch cards
Shareable cards straight from an entry.
Fish with people
Friendly rivalry, real bragging rights.
Community feed
Posts, photos, likes and comments.
Tournaments
Hosted contests with live standings.
Quests
Daily, weekly and monthly challenges.
Notifications
Invites, replies and unlocks.
Search
Find any spot, species or angler.
Pro
The analysis layer, on top of the free intel.
The numbers are free.
Pro reads them for you.
Every rival app paywalls the bite times. CAST never will — that data is deterministic maths on public inputs. Pro pays for the layer above it: your patterns, your playbooks, and a diagnosis when the session goes flat.
Free
Forever£0
The whole field guide, and all of the intel.
- Solunar bite times & tide extremes
- 10-day forecast and 24-hour bite outlook
- FishKey identification, unlimited
- 235,000+ named waters, plus a mark on every shore, bank and pier
- Catch heatmap, private waypoints and local rules
- Catch log, Trophy Room, Species Dex
- Sessions, crew, feed and tournaments
Pro
£4.99 / mo
Or £40 a year — save 33%. Seven-day free trial, cancel any time.
- Angler Intelligence — your golden hours, moon phases and spot affinities
- Species playbooks — methods, baits and structure, sharpened by conditions
- Catch Doctor — a live read on why they aren't biting
- Live tactics at the mark you're standing on
- Advanced analytics and specimen tracking
- Export your catch log
- Early access to new features
Ready for your
next catch?
The full app runs in your browser today — sign in and it's yours, free. iPhone and Android are next.