Pushsafer - send & receive of Push Notifications to iOS, Android and Windows 10 Devices. My current flow of notifications with my Home Assistant setup is to have it send me an SMS via Twilio (I like that SMS will still work even in places with no data service.) The prices for Pushsafer are reasonable ( 1000 additional API calls 0.99 EUR (0.99 EUR / 1000 API Calls) ) so I may give it a go as well.