Blocs Wave 13 lands and it brings a nice new feature, an EQ. Ampify says:

An equaliser (EQ) is one of the most important tools for shaping sound when creating a song. We’ve added a beautiful, high-quality, yet intuitive 3-band visual EQ to Blocs Wave, available now as an In-App Purchase.

The Blocs Wave EQ is a 3-band visual EQ for iPhone and iPad (it does require an In-App Purchase though, although apparently you can try it out before you buy it) the design follows the colours of the sounds, which works well and is a good match for the app overall. As ever, and with almost any app update there are some routine bug fixes in this version too.

For a free app I think Blocs is great, and is a great way to start to make music.

Find Blocs Wave on the app store