Smart frost alerts that arrive before you need to leave—so you're never caught off guard by a frozen windshield.
You wake up, get ready, and walk outside only to find your car covered in frost. Now you're late, cold, and frustrated—again.
Frostly checks the weather and alerts you before you need to leave. Set your departure time, choose how early you want to know, and we'll handle the rest.
Set your departure time and choose when to be alerted—15 minutes, 30 minutes, an hour, or more before you leave.
We analyze temperature, dew point, wind speed, and cloud cover to predict when frost will actually form.
Get alerted on your phone even when the app is closed. No need to check manually.
Powered by the National Weather Service API. Works across the entire United States.
Set a custom temperature threshold. Get reminded to warm up your car when it's cold.
Your settings stay on your device. We only use your location to fetch weather data.
We use this to find your exact location and fetch accurate local weather data.
Tell us when you normally need to leave. Early morning? Afternoon? We've got you covered.
Want 30 minutes notice? An hour? Pick what works for your routine.
When frost or cold weather is expected, you'll get a notification at exactly the right time.