Storm Window

When it's safe to be outside

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Storm Window helps you find safer outdoor windows when weather risk is changing. Instead of giving you another raw forecast, Storm Window turns hourly weather data into a clear outdoor risk timeline, highlighting when conditions look clear, marginal, stormy, or severe. It is built for runners, cyclists, walkers, golfers, beach days, trail time, work crews, and anyone who plans around lightning, heat, wind, air quality, and rain. Core features: - Clear "go / wait" style outdoor risk guidance - 48-hour hourly risk strip, shown as bars or dots - Lightning-aware storm risk - Heat, air quality, wind, UV, rain, and snow context - National Weather Service alert awareness - Current-location planning, plus one saved place - Home Screen widgets and Apple Watch support - Built-in explanations of what's driving each hour's risk Storm Window Pro adds: - Multiple saved locations - Activity-specific risk profiles - Custom activity profiles - Personal heat and AQI sensitivity tuning - Full hourly detail on tap - Driest-stretch highlight within your safe window - Per-location widgets and complications Storm Window Pro+ adds: - Trips: pin an upcoming event and get its own safe-window forecast and alerts - "Should I Go?" activity-aware guidance - Apple Intelligence-personalized explanations for hourly risk - Forecast change reviews - 48-hour forecast summaries - Apple Intelligence-powered guidance on supported devices — every Pro+ feature still works without it, using Storm Window's own built-in explanations Storm Window uses deterministic risk rules for its core safety assessment. Pro+ explanations help you understand the forecast, but they do not replace the underlying risk rating. Storm Window is forecast guidance, not a lightning detection system or a guarantee of safe conditions. Weather can change quickly. When thunder roars, go indoors. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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- Trips (Pro+): pin an upcoming event or trip and get a dedicated safe-window forecast for its date, time, and activity — with its own alerts if the outlook changes. - New Dots chart style: an alternative to the classic bar chart for the 48-hour risk strip, available on both the app and home screen widget. - Driest-stretch highlight (Pro): the safe window now calls out the driest stretch within it, so you can plan around the best hours, not just the safe ones. - Clearer Heat Stress Index guidance: new in-app explanations (with a side-by-side comparison to plain air temperature) on why Heat Stress Index can read differently than the thermometer. - Custom Activity editor improvements: corrected heat-tolerance labeling, plain-language section names, and an advanced-user warning for anyone tuning thresholds by hand. - Widgets and complications now open to their own pinned location and activity when tapped, instead of whatever was last viewed in the app. - Notifications now include the location and activity they're about, so alerts are clear at a glance across multiple saved places. - Various refinements to the forecast summary, hourly explanations, and chart legends, plus bug fixes. - Added a Ticker Tape style display at the bottom showing the info for all the locations the user selected

The developer, Daniel Schumacher, 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 Linked to You

    The following data may be collected but it is not linked to your identity:

    • Purchases
    • Location
    • Identifiers
    • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More

The developer has not yet indicated which accessibility features this app supports. Learn More

Seller
  • Daniel Schumacher
Size
  • 26.2 MB
Category
  • Weather
Compatibility
Requires iOS 26.0 or later.
  • iPhone
    Requires iOS 26.0 or later.
  • iPad
    Requires iPadOS 26.0 or later.
  • Mac
    Requires macOS 26.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 26.0 or later.
  • Apple Watch
    Requires watchOS 26.0 or later.
Languages
  • English
Age Rating
4+
In-App Purchases
Yes
  • Pro+ Monthly $4.99
  • Pro+ Annual $29.99
  • Storm Window Pro Annual $19.99
  • Storm Window Pro Monthly $2.99
Copyright
  • © 2026 SiPhy LLC