Just submitted to the App Store.
SkyEater OO has been ported to iPhone for my personal need :). You can download it free from AppStore. (but you’ll have to buy an in app purchase item for sound control…)
Renzoku Drums 1.0.1 out now on the AppStore. This version includes a new feature (Sound setting). The volume of each instrument can be adjusted with sliders on Sound setting screen.
The quick start guide video for Renzoku Drums is here.