OpenWeer vs Helder

The clearest rain radar for the Netherlands. Open, honest, ad-free. Built on the official rain and weather data from KNMI — the same source used by Dutch journalists and meteorologists. No account. No tracking. No hidden subscriptions. Just knowing whether to grab a jacket. LIVE RAIN RADAR See up to two hours ahead, anywhere in the Netherlands. The radar plays back at a smooth 60 fps, with a time slider that responds the way you'd expect. Zoom in to street level, zoom out to the whole of Europe. 8-DAY HOURLY FORECAST Temperature, chance of rain, wind speed and direction — everything in one view, for any point in the country. RAIN ALERTS THAT MAKE SENSE One push notification just before it starts raining at your location. Not ten. OpenWeer reads the KNMI radar every five minutes and knows exactly when to ping you. WIDGETS AND LIVE ACTIVITY Put the weather and rain radar on your Home Screen or Lock Screen. During a shower, the Dynamic Island shows a live countdown — no need to open the app. ASK OPENWEER "Should I leave now to get home dry?" "Can I hang the laundry outside?" Ask in plain English and get an answer grounded in the latest measurement. PRIVACY BY DEFAULT • Fully open-source under the MIT license. Read the code on GitHub. • Weather data from KNMI (CC-BY-4.0), credited as required. • No account, no ads, no tracking. Your location stays on your phone. • No ad networks, no analytics cookies, no hidden costs. MADE IN THE NETHERLANDS OpenWeer is an independent project running on open data and open code — for anyone who wants to know what the weather's doing, without the noise. Ideas, issues, or pull requests welcome at github.com/openweer/openweer.

HELDER — WEATHER, CALMLY DELIVERED Weather apps shout. Helder doesn't. No loud colors, no ads, no account, no tracking. A classic design that tells you at a glance whether to bring a coat, when the rain passes and when the sun comes back. Made for creatives, athletes and everyone who lives outdoors. WHAT MAKES HELDER DIFFERENT • Rain by the minute, straight from live radar. If it's raining outside, Helder says so. • A rain graph you can drag through: what time, how much, and how warm. • Radar on the map with playback — NEXRAD coverage across the US and Canada, plus 8-hour, temperature, wind and pressure layers. • Official warnings from the National Weather Service, shown as a clear banner and, if you like, as a notification. • Fully customizable: build your own weather page from 21 blocks to reorder, hide and tune. Hourly, 14 days, wind rose, barometer, pollen, air quality, sun and moon, golden and blue hour, and more. • Sport and outdoors: hourly scores for walking, running, cycling and outdoor sports, with the best moment of the day. • For creatives: Helder tells you when the weather turns special — a golden sunset, a clear starry night, a rainbow. Handy for photographers and stargazers. • Notifications that matter: official warnings, rain alerts in your own time window, and the day in one sentence each morning. All per place, all optional. • Units your way: °F or °C, mph or km/h, inches or millimeters. • Privacy without the fine print: no account, no tracking, your location rounded to about a kilometer before it reaches our server. The forecast comes from our own server in Germany, built on open data from KNMI, ECMWF and the German weather service. Home screen widgets, light and dark, five languages. Completely free — no subscription, no paywall. Forecast: NOAA HRRR and ECMWF via Open-Meteo. Radar: RainViewer (NEXRAD). Alerts: National Weather Service. Air quality: Copernicus CAMS. In Europe: KNMI, DWD ICON, EUMETSAT and MeteoAlarm.