The Shazam app for iOS comes with the ability to link your Spotify account so you can stream the music you tag via Spotify directly from the Shazam app itself. A recent update to the app included a complete rewrite for this feature, so it's now more stable than ever before.
All you have to do is connect your Spotify account to the Shazam app, and the app will take care of the rest for you, allowing you to listen to full tracks in Shazam instead of just 30-second song previews.
In this tutorial, we'll be showing you how to link your Spotify account to the Shazam app in iOS.