Anyone who's been using Android since the early days probably knows about Shazam, the music recognizing app that wowed us with its ability to listen to a song and immediately give you details about the track. It was one of the first big-name apps available for Android, and it was free. A year or so later, they changed their business model to a premium app that cost $5. The free version only allowed you to identify 5 songs per month.
Sound Hound, an app that performs the same task emerged later on for both iOS and Android and was marketed in a similar fashion; free versions with only 5 tags, and unlimited versions for five dollars. The key difference, however, was that Sound Hound also identified songs by humming or singing, not just hearing the official album or radio version.
