What are some alternatives?
When comparing BlokDust and NanoStudio, you can also consider the following products
Splice Beat Maker - Make and share beats in your browser
G-Stomper Studio - G-Stomper Studio is a feature-packed, mobile music production tool.
Sampulator - Make (and record) beats on your keyboard
Stagelight - The Easy Way to Create Music.
SunVox - SunVox is a small, fast and powerful modular synthesizer with pattern based sequencer (tracker).
KORG Gadget - KORG Gadget - From iOS to Mac. Music production software to help your musical imagination become reality.