Amazon challenges Apple and Spotify with new music streaming service

Amazon.com Inc on Wednesday launched a full-fledged music streaming service with subscriptions as low as $3.99 per month for owners of its Amazon Echo speaker, accelerating the industry trend toward more flexible pricing after years of sticking to $9.99 subscriptions. The new streaming service, called "Amazon Music Unlimited," lets users access a vast catalog of songs on demand, similar to Spotify and Apple Music.