My very favorite synthesis app, a lot of useful tweaks: all the scales (modes), presets as examples (InApp addOn), visualizer with controller, et al, symbiotically offering that original "knobs-and-sliders" immediacy to playing where its intuitive and almost autonomous to reach out and adjust, knowing what will happen or be happily surprised by the results. With an iPad version, external midi USB keyboard (plus Apple adapter(s)), and youre set for months of hours long Jam sessions. Record, save, share (iOS 8), read the tutorial, & enjoy.
Theres no one way to do synth, but this does Moog well, has been out for years, and keeps working. Did I mention it sounds awesome? A diverse palette from expert designers. Cant go wrong.
jctMUSE about Animoog for iPhone