This summary provides an overview of how to build a parental control application using the Vonage Voice API and Android 10's Call Redirection feature to mask sensitive phone numbers. The application allows parents to configure their child's phone number, which is then used to proxy calls made from the device to a Vonage number, protecting the child's privacy. The application uses a NodeJS webhook server to handle requests from the Android app and redirect calls. The solution provides a flexible way to create call proxies for various use cases, leveraging the capabilities of the Voice API.