At boberdoo.com, we specialize in building Amazon Alexa Skills. Our most recent project, PingRing.com, combined not only Amazon Alexa voice commands, but also a complete, corresponding iOS mobile app. Our PingRing skill and mobile app allow users to locate their lost iPhone via voice command and can also be used to locate and message other users within your group. Our video shows exactly how it works!
https://www.boberdoo.com/alexa-skill-development/