CheckWeather.io
Every forecast, compared
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
See how much the forecast models agree before you plan your day, and which one has actually been right where you live.
CheckWeather puts the public weather models for your location side by side and shows you two things no other weather app does: how much they agree, hour by hour, and which one has actually been right where you live.
WHAT YOU SEE
- A forecast confidence chip: High, Medium or Low, with how far apart the models are right now.
- The number on screen comes from the model that has been most accurate in your city over the last 30 days, never a blind average.
- Rain, next 48 hours, model by model: each model's own rain, hour by hour, on one scale, with midnight marked.
- Who says what: every model's high, low and rain for each of the next eight days, with a three-hour table underneath.
- How right were they here: yesterday's forecasts held against what happened, and how far off to expect a forecast at one, three and seven days' notice.
- Rain radar with a scrubber, air quality and pollen, sea state on the coast, sunrise, sunset and golden hour, and severe weather warnings from the National Weather Service in the US.
- An alert when the models stop agreeing about tomorrow, plus a morning briefing and rain alerts, scheduled on your phone from the forecast it already has.
THE MODELS
United States: NWS National Blend, NOAA GFS, ECMWF. United Kingdom: Met Office, ECMWF, GFS. Canada: Environment Canada GEM, ECMWF, GFS. Australia and New Zealand: ECMWF, GFS, DWD ICON. Anywhere else: the three global models every national forecaster starts from.
ACCURACY YOU CAN CHECK
Every model's forecast is scored daily against reanalysis of what actually happened, across 300 cities in each country, on checkweather.io. The apps that keep their models private cannot be checked like this, so we do not pretend to grade them.
NO ADS, NO ACCOUNT, NO TRACKING
Forecasts from Open-Meteo. Radar from RainViewer. City photographs from Wikimedia Commons, credited in the app.
Ratings & Reviews
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The developer, Nortra Online ApS, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Nortra Online ApS
- Size
- 55 MB
- Category
- Weather
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Nortra Online ApS