Maschine Scene Selector
iOS Universal Music
With this app, you can switch the scenes in the Maschine sequencer and play some beats and melodies via the implemented keyboard layout. It also offers a button to switch to the next scene (depending on which one you selected before) so you don't need to touch the "scene" button on your Maschine ever again.
Why would you possibly need it? It strongly depends on what kind of performer you are, but for me it was quite annoying that there is no possibility to switch to the next scene without having to interrupt your performance.
Works with both PC and Mac, connects through WiFi