What is the verdict?

A. Cool. Gives me a reason to see what Twitter is all about.

B. Great! I have a Twitter account. Now I am going to lose more time to tweeting and checking followers who like my music tastes!

C. Another music app?

It seems like everyone is creating a music app. Why? Music is a great way to engage users. In addition, music apps are a great way to obtain analytics and determine the habits of users. This is valuable marketing information for a variety of companies.

In Twitter’s case, an app is a way to maintain user engagement. It keeps their ecosystem from going stale.