Freeze/frost alarm for iOS I want to receive an alert whenever there is a freeze or frost advisory in my area, so I can know when to cover my plants. I would assume there is an app for that, but there are dozens weather apps, and all their features are not listed. 

Ideally, I just need something like this Android app:
https://play.google.com/store/apps/details?id=com.cook.org&amp;hl=en

Many apps offer weather alerts, but I don't want to get alerts for all inclement weather, just cold weather, and none made it clear that this is possible. Paid or free is fine. Thanks!
One good option might be to combine IFTTT and Pushover. 

I currently get alerts whenever snow is forecast via this setup.