Everything here except Fuel on board is entered once and remembered on this device (not sent anywhere but this one request) — so if you're sharing this app, each pilot fills in their own numbers once, on their own browser, without affecting anyone else's. Fuel on board is flight-specific and always starts blank — leave it blank to skip the fuel check. FAA day-VFR minimum reserve is 30 min (14 CFR 91.151); reserve required here is your own standard.

0 = compare against current conditions (METAR) at each route airport, right now. Above 0 switches to TAF forecast conditions at each airport's own estimated arrival time for a departure that many hours from now. Minimums below are remembered on this device; departure time is not (it's flight-specific, entered fresh each time).

Saved only for this browser tab's current session — reload-safe if you lose signal mid-flight, but gone once the tab closes, so it never carries into a different day's flight. Entirely optional; leave it blank and nothing else changes.