Kyiv Independent posted this in case anyone wants to download the siren app to their phone
https://apps.apple.com/ua/app/повітряна-тривога/id1611955391?l=uk

When the air alarm sounds in Kyiv, the noise of the siren fills the streets, though it’s not always easy to hear if you’re inside a building or taking a nap – but, there’s an app for that.

The air alert app, developed with the support of Ukraine’s government, plays a loud warning when there’s a threat of a missile or drone strike. It’s common to hear everyone’s phone go off at once when an alert starts or all clear is signaled. You can even download the app yourself to see how frequently the alarm goes off. You can set it to any city in Ukraine, and experience the same alarm as those on the ground.