Frost Forecast: Frostcast
Will your windshield freeze?
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Will your windshield be frosted when you leave tomorrow? On clear, calm nights the glass gets colder than the air. Frostcast estimates it and gives one clear verdict.
Frostcast answers one question each evening: will there be frost or ice on your car's windows by the time you leave tomorrow morning?
A weather app shows you the air temperature. Your windshield is colder. On a clear, calm night the glass loses heat to the sky and can drop several degrees below the air — which is why you find frost at +3 °C. Frostcast estimates the glass temperature hour by hour, compares it with the frost point, and tells you what to expect: frost, an ice film after dew or rain, freezing rain, snow — or nothing at all.
WHAT YOU GET
• One clear verdict for tonight → your departure: frost unlikely, possible, likely, or ice/snow likely
• Estimated glass temperature at the coldest hour, with the air temperature and frost point for comparison
• A one-line plan: cover the windshield tonight, or how many extra minutes to allow in the morning
• Why: clear sky, calm air, humid air — the three things that make frost
• Settings for where you park (open sky or under a roof) and how you usually clear the glass
FROSTCAST PRO (one-time purchase)
• Your own departure time — the verdict for when you actually leave
• Evening notification, only on nights with frost risk
• Morning reminder 30 minutes before departure when frost is likely
• Hour-by-hour glass temperature through the night
No subscription. No ads. No tracking. No account. Your location is rounded on the device before it is sent to fetch the forecast, and it is never stored.
Frostcast is a forecast-based estimate. It can be wrong. Check that all windows are clear before you drive.
Weather data: Apple Weather / Open-Meteo.
Ratings & Reviews
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The developer, 合同会社SUTEKINA JIKAN, 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
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- SUTEKINA JIKAN ,LLC
- Size
- 38.4 MB
- Category
- Weather
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 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 and 15 more
- English, Danish, Dutch, Finnish, French, German, Italian, Japanese, Korean, Norwegian Bokmål, Portuguese, Russian, Simplified Chinese, Spanish, Swedish, Traditional Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Frostcast Pro $2.99
- Copyright
- © 2026 SUTEKINA JIKAN, LLC