For river anglers

River fishing
deserves better
than a solunar clock.

Lake apps treat rivers as an afterthought. Cast & Scan integrates live gauge data from USGS, Environment Agency, Pegelonline and IMGW to score bite windows that actually account for what river fish respond to: flow trend, water level, and the conditions that follow rain.

Scan a river now

Live flow trend

Rising, stable, falling — and how fast. Flow change is the single biggest predictor for river bite, more than pressure or solunar combined.

Multi-source gauge data

USGS in the US, Environment Agency in the UK, Pegelonline in Germany, IMGW in Poland. Nearest-station with 40km radius, fallback across borders.

Post-peak bite detection

The window after a flood crest is the most productive river fishing on Earth. Our peak-detector flags it within minutes of crest.

Per-species river weights

Stream trout cares about flow + hatch, river pike about clarity + drift, river barbel about temperature + level. Different weights, same engine.

Why river fishing is different

On a lake, the dominant variables are weather and solunar. On a river, flow is so dominant that everything else becomes secondary — a falling barometer with rising muddy water is still a blank session. River anglers know this. Most apps don't.

The Cast & Scan scoring engine treats flow as a first-class factor for any spot tagged as a river. Live gauge data from the nearest station within 40 km is pulled at scan time, the trend over the last 24h is computed, and the score is reweighted accordingly:

Stable flow — full weight on weather, light, solunar.
Slow rising — moderate boost to predator species (food disturbed, fish opportunistic).
Sharp rising into peak — heavy penalty (visibility crashes, fish move out of channel).
Post-peak falling — strong boost (fish recolonising clearing water — the prime window).
Long stable low — penalty for warm-water species, boost for predators concentrated in pools.

Coverage by region

Wherever a recognised gauge sits within 40 km of your scan point, you get live flow data. Fallback to the next-nearest provider across borders means dual coverage at the US/Canada and EU/non-EU lines. Approximate coverage today:

Region	Source	Coverage
United States	USGS Water Data	Comprehensive
United Kingdom	Environment Agency	Comprehensive (England)
Germany	Pegelonline	Major rivers, federal coverage
Poland	IMGW Hydro	Major rivers
Other EU	—	Coming via EFAS integration
Other regions	—	Pressure/weather only — no gauge data yet

What you do, what we do

On the scanner: pick "River" as your water type, drop a pin on the section you fish, choose your species. We pull the nearest gauge, compute the flow trend, and produce three ranked bite windows for the next 24h with the flow factor weighted in. No signup, no install, nothing to pay.