I had been using the original EQu app for a while when I discovered this app. I have always enjoyed the ease of control you have when using the EQu apps, such as being able to add and remove control points, shift the curve up and down and side to side, and save presets. When I saw that I could use the EQu app with Spotify, I knew I had to have it!
Although the Spotify app now includes a built-in equalizer, the audio quality is only subpar, and it does not allow you to save presets. It works in a pinch, but the EQu for Spotify app is perfect for when you really want great sounding music from one of the largest music libraries available.
I also wanted to point out that this app not only allow you to play music from Spotify, it also incorporates a few usability features that I find very useful. Of these features, Queue and Music Quality stand out to me. I often queue up songs, and I enjoy the additional control I can get by selecting music quality (96 vs 160 vs 320 kbps).
Aaron121848183 about EQu for Spotify