TrueWind vs Undercast Weather Aether

Know the water before the gun. TrueWind puts wind, current, tide, waves and NWS marine alerts for your race window on one screen, built for sailors and regatta racers instead of beach-goers. RACE-DAY MODE • Start-line bias: mark the pin and the committee boat and TrueWind tells you which end is favored, and by how many degrees • Wind confidence: Stable, Mixed or Shifty, read from how much the forecast swings across your race • Wind now, current at the gun and the next tide turn, in big type you can read on deck RACE REMINDERS • Add your weekly club race or a one-off regatta once • A full briefing for your exact start and finish: hourly wind and gusts, a flood/ebb current curve, tide highs and lows, sea state and spring/neap strength • Countdown notifications with a picture of the conditions, plus an alert as soon as an NWS warning covers your race • Your races are saved to your account, so a new phone gets them back LOCAL WIND • Send in your club's anemometer or a nearby weather station. Once it's approved, any sailor can add it • Apple Weather wind for any harbor, with a forecast across your race hours • See trend, gusts and how the wind has shifted over the last 6 hours TIDE, CURRENT & WAVE MAP • NOAA tide stations with a live height estimate and a 30-hour curve • Current stations with arrows that point the way the water is flowing right now • NDBC buoys with wave height, period, wavelength and swell direction WEATHER & ALERTS • 5-day wind forecast with gusts, direction and an hour-by-hour view • Race-context notes: building, easing, veering or backing • Gale, small craft, storm and other NWS marine warnings for where you sail HOME SCREEN WIDGETS • A countdown to your next race with wind, current and tide • A current-at-the-start widget, and an extra-large layout that lists the races after it Forecasts, tides and currents come from NOAA and the National Weather Service, so coverage is US waters. Sign in with Google to get marine alerts, local wind and account backup. From Tuesday-night club racing to weekend regattas and everyday boating, TrueWind shows the marine conditions that matter without the clutter of a general weather app.

UndercastWeather Aether delivers National Weather Service forecasts alongside on-device, model-enhanced predictions you can compare side by side. The idea is simple: you should be able to see the official forecast AND a smarter interpretation of it — without giving up your privacy. WHAT MAKES UNDERCAST DIFFERENT • Dual-mode forecasts — switch between raw NWS data and Aether-enhanced predictions with a tap • On-device learning — Aether refines its forecasts using local signals; nothing leaves your device • Severe weather Live Activities — Tornado, Thunderstorm, Flood, and other warnings appear on your Lock Screen and in the Dynamic Island the moment they're issued, with hazard-specific icons • Astronomical data — sunrise, sunset, moon phase, and twilight times sourced from the U.S. Naval Observatory • Searchable — find any U.S. location by ZIP code, city, or state, no location sharing required BUILT FOR APPLE PLATFORMS Native experiences on Mac, iPhone, and iPad — with a Home Screen widget for at-a-glance conditions. ONGOING UPDATES UndercastWeather regularly updates Aether to improve accuracy, performance, and features. PRIVACY FIRST Aether's learning happens on device. Your trained data never leaves your devices — with optional iCloud sync, it moves only between your Apple devices through your private iCloud account. You don't need to share your location to use the app, and we don't collect telemetry on your forecast usage. Our apps do not use third-party analytics, advertising SDKs, tracking SDKs, data brokers, or third-party service connections. We encourage every user to turn on Apple’s App Privacy Report to see this for themselves. To enable App Privacy Report on iPhone or iPad, open Settings > Privacy & Security > App Privacy Report > Turn On App Privacy Report. After you use the app for a while, iOS will show the network domains contacted by the app. For our apps, expected network activity should be limited to Apple-operated services needed for normal App Store, iCloud, device, or system functionality. In our weather app, you may also see direct connections to official weather or environmental data sources, such as NOAA, EPA, or similar public data originators used to provide the requested forecast, alert, air-quality, or environmental information. We believe privacy claims should be inspectable, not merely promised. NOTE Only locations within the United States are supported, as Aether is trained (on device) on data sourced by you from the National Weather Service.