Deep Lagune

Deep Lagune is your all-in-one offline fishing companion — a precision toolkit for serious anglers who want to fish smarter on every trip. No subscriptions, no internet required, no data sent anywhere. Every calculation runs entirely on your device.

Build the perfect rig in seconds. Tell Deep Lagune your target species, technique, rod setup, water depth, current, and wind — and the Rig Builder instantly computes your sinker weight, leader length and rating, hook size, and the two strongest knots for your exact line combination, complete with retained-strength percentages and wrap counts. It even estimates cast distance and flags under- or over-weighted setups before you ever reach the water.

Know when the fish will bite. The built-in Bite Forecast engine blends solunar theory, dawn and dusk feeding peaks, moon phase, and on-device conditions to generate an hour-by-hour activity curve for every spot you save. Major and minor bite windows, sunrise, sunset, and moon transit times appear at a glance. Dial in barometric pressure trend, weather, season, and water temperature to sharpen every prediction.

Log every catch and reveal your patterns. Add catches in seconds — snap a photo, choose from 14 species profiles, and let Deep Lagune estimate weight from length and girth using species-specific formulas. Once you've logged five catches, the Pattern Engine unlocks: it analyses your full history to surface your best conditions, best spots, best rigs, and best times of day, then hands you a plain-English suggestion for your next outing. All your data stays private, on your phone, forever.