Undercast Weather Aether vs Before It Strikes

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.

Severe weather, before it happens. You shouldn't find out about a storm when the first bolt hits. Before It Strikes watches the sky for you — pushing official National Weather Service warnings the instant they're issued, tracking storms headed your way, and counting down exactly when it's safe to go back outside. Free. Nationwide. Built for anyone who has to make the call to head inside. -Lightning safety countdown When lightning strikes within 10 miles, a 30-minute timer starts — and resets with every nearby strike, just like the 30-30 rule the pros use. When it reaches zero, you're clear. It lives right on your Lock Screen and Apple Watch. -Official NWS alerts, instantly Tornado, severe thunderstorm, and flash-flood warnings straight from the National Weather Service — for home, the lake house, the kids' school, anywhere you save. With a live expiration countdown, plain-English guidance, and every affected county. - Hi-res 3D radar Crisp, smooth radar you can tilt into 3D and zoom to your own street. 150+ live radar sites, nationwide — pan to any storm in the country. - Storm Center One screen that reads the sky: a 1–5 threat level, live lightning rate, the nearest strike, the next-6-hour outlook, and local storm reports as they land. - See it coming A heads-up when a storm is overhead or heading your way — with tornado, wind, and hail threats in plain words, before the first bolt. - On your wrist The all-clear countdown mirrors to your Apple Watch as a glowing ring — a glance tells you whether it's safe to go back out. - Follows you Save every place you care about, or let it track wherever you are. Loud when it counts, silent when it doesn't. No subscription. No paywall on safety. Every feature, free. A note on safety Official National Weather Service warnings are always the source of truth. Some features — such as lightning prediction and storm scoring — are experimental situational awareness and should never be used in place of official warnings or lightning-safety guidance. When in doubt, seek shelter.