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The Idea
A fishing forecast for Scandinavian summer freshwater. You enter the conditions on the water in front of you. Tacklesense scores the day from one to ten and recommends a specific lure or fly, the right line and leader, depth, and braid colour — calibrated against Norwegian, Swedish and Finnish guide knowledge for six species across eight regions.
No accounts. No analytics. No network requests. Everything runs on your iPhone.
Try the forecast
A scaled-down preview of the engine. The real app reads over fifteen conditions and weighs them against around fifty calibrated rules — this one reads four. Pick the conditions, watch the score swing.
Engine
Tacklesense reads species biology, peak windows, ice-out timing, midnight sun, water clarity, pressure trends, time of day, and more — weighed against an engine tuned through fourteen rounds of expert calibration plus seven rounds of regional held-out validation.
The output is a single score and a clear recommendation. No dashboards, no graphs to read. Made to work where other apps lose signal.
Why Tacklesense
Most fishing-forecast apps on the App Store hand the day to a real-time AI model and let it guess a score from a few generic conditions. No verification, no field testing, no calibration against what guides actually see — just a number a model felt good about that moment. Tacklesense isn't that.
Tacklesense never calls a backend, never asks a language model, never sends a single byte off your phone. Every score and every recommendation is computed locally by a deterministic engine. Works on the most remote mountain lake, the wildest spate river, on a plane with airplane mode — anywhere your phone runs.
Most fishing apps try to cover the whole planet and end up shallow everywhere. Tacklesense covers only the Nordics on purpose. That focus is what lets the engine know the difference between a Vestlandet spate river and a Saimaa weed bay, between Northern Norway's midnight sun and Trøndelag's bright nights, between a Jämtland grayling stream and a Finnish lake-district pike. Eight sub-regions, each with their own logic.
The score engine for every species was tested against thousands of independent, blind expert ratings — Scandinavian guide knowledge scoring scenarios with no access to the app or its code. Twenty-one rounds of calibration. Every modifier defended by trusted, verified material. The whole point was to make sure the engine agrees with the experts, not the other way around.
Lure choices, fly patterns, line ratings, depth advice, ice-out timing, water-temp optima per species — none of it was generated by an LLM and shipped on vibes. Every claim was cross-checked against verified material and tuned until the recommendations matched what local guides actually pick. The fishing is what you trust your day on. So we did the work.
Tacklesense Pro
The free app is the full forecast — every score, every region, every species. Pro adds three things.
Free names the tackle category. Pro names the precise pick — Heavy Vibrating Spinner — and the fly size and dressing.
Mark what's in your tacklebox. Recommendations are filtered to the highest-ranked item you actually own.
Switch the accent from Forest Green to Reflective Gold. Your home-screen icon follows.
The Detail