Absolutely the Best
You wont find a better series of binaural entrainment applications anywhere in the App Store than by searching for those developed by Banzai Labs (Ive been on many exhaustive, epic quests to find their equal, but have always returned empty-handed).
My one wish is that they would provide a set of equal-in-quality/price/variety isochronic tones for those among us for whom isos tend to work more quickly & effectively. That said, these are the only binaurals that I am certain have been effective for me.
JokiGirl about
BrainWave: Dream Inducer ™