Live conditions, species behaviour and your own logbook, turned into a plan for the water in front of you.
Set the water, then the lure or rig. Weight, colour, depth and presentation follow, with a plan B if nothing touches.
Log catches and blank days. The photo, length, depth and conditions stay with each one.
Once enough comparable days match, your own history can shape the score. Thin history stays quiet.
Screens show an example record.
Pick a species. See which regions score better at dawn, midday, dusk and night over the next three days.
Species
Day
Time of day
Worked example for European seabass. Live scores are in the app.
Water temperature, depth, feeding time and peak months, straight from the field guide in the app.
Dicentrarchus labrax
Gadus morhua
Scomber scombrus
Pollachius pollachius
Belone belone
Pleuronectes platessa
Scophthalmus maximus
Platichthys flesus
Salmo trutta (anadromous form)
Merlangius merlangus
Labridae (family)
Raja clavata
Hippoglossus hippoglossus
Pollachius virens
Limanda limanda
Mustelus mustelus
Also in the field guide: insects, baitfish, crustaceans, molluscs, worms and amphibians, so you can match bait or fly to what the fish eat.
When I came back to fishing after years away, better tackle did not make the method any clearer. The same setup caught fish one day and blanked the next.
As a biologist and software engineer, I started recording the conditions around every catch and every blank. GILLI grew from that record.
Founder is lifetime Pro with the same feature access.
Fishing water we do not cover yet? Tell us where and what you fish for.
GILLI is a fishing field guide that gets more personal as you use it. It starts with species biology and current conditions. Log catches and blank days and, once enough similar history builds, it can show what tends to repeat on your water.
GILLI is free to download. The core forecast, catch and blank-day logging, Photo ID, Photo Measure, Prize fish, trip planning, the licence wallet, Catch Map, Spot Oracle, Fishing Intelligence, the Encyclopedia and the Lure Field Guide are free. Pro adds forecast depth for the fish you picked, the six-week forecast, Personal Outlook and specialist tools.
Yes. Marine and freshwater modes use different species, seasonal and water context. In winter, freshwater adds ice safety and under-ice activity with per-species winter tactics.
Predator and lure fishing for pike, perch and zander. Coarse and feeder fishing for carp, bream, tench and roach. Marine fishing from the shore, a pier or a boat, including feathering, jigging and bottom rigs. Fly fishing for trout and grayling, with dry, nymph and emerger patterns matched against the insects that hatch. In winter, ice safety and under-ice activity.
Yes, where regional data supports it. Check which species are present, seasonal context, methods, permits and current conditions before the trip. A field-guide entry does not guarantee local forecast support.
Yes. Photo ID identifies a fish and carries the result straight into the catch log. Photo ID and Photo Measure are free for everyone.
Download basemaps and species data, and save catches offline. Weather, tide and forecast updates still need a connection.
GILLI is publicly available on iPhone. There is no Google Play listing yet.
A technician saw bluefin tuna hunting at the Thorntonbank wind farm, and a survey caught three young tope. Why both left this stretch of the North Sea, why they are coming back, and how a tag follows them.
European sea bass are ordinary on warmer Atlantic coasts. On the Swedish west coast they arrive as visitors at the edge of the range, so a summer harbour day still starts with whether the fish is even there.
Adult Atlantic salmon leave the sea and run the river to spawn. They will still take a fly on that journey, because the strike remains even when the day's work is the run.
