BiteCurve: Fishing Forecast

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What it is. A fishing forecast for your own spots: a bite index from 0 to 100 and the best window of the day, worked out from weather, sun, moon and, on salt water, tide. It is an estimate. A high index means conditions favor a bite, not that you will catch fish.

How the index works

Add a spot on the map and choose the target species and the kind of water. BiteCurve scores every hour and shows the best window for today and the days ahead.
The index combines light, water temperature (estimated from the weather), wind, the pressure trend, the moon's position and, for saltwater spots, the tide at the nearest station. 50 is neutral. Weather comes from Apple Weather.
The weights are based on published studies where they exist and are heuristics where they don't. Species temperature preferences are approximate.
Log your trips, including the ones with no catch. The expected catch for a spot then adapts to your own record there.

Where it works

Weather, sun and moon work worldwide. Tide predictions use NOAA stations, so tide times and the tide curve are available for coasts of the United States and its territories only. Elsewhere a saltwater spot is scored without tide.

BiteCurve Pro

Free: the trip log, up to 3 saved spots, and the best window and index for today and tomorrow. BiteCurve Pro adds unlimited spots, the 10-day outlook, the hourly bite curve, the tide curve and the expected catch scaled by your own log. Pro is a yearly or monthly subscription through Apple; manage or cancel it in Settings → Apple Account → Subscriptions.

Troubleshooting

"Offline — forecast saved …": there is no data connection or the weather service didn't answer. BiteCurve keeps the last forecast for every spot for about 10 days. With no saved forecast it shows "No weather data — sun, moon and tide only".
"No tide station found near this spot": the nearest NOAA station is too far away, or the spot is outside NOAA's coverage. The score then runs without tide.
Live pressure doesn't change: the phone's barometer is read only while a trip is running at that spot, and needs Motion & Fitness access (Settings → BiteCurve).
"Could not load subscription plans": check your connection and tap Try Again. Purchases can be restored from the same screen.

Contact

Questions or problems: [email protected]. Mail is answered within two working days.