Later on, that status became less cloudy, particularly because Android is (semi) open-source (i.e., some costs may apply to manufacturers who want to install Google Mobile services). BlueStacks came out in the odd 2009 and, at that time, it had, more or less the same ‘legal status’ as Citra, Snes9x, or other Super Nintendo emulators – borderline legitimate. Although BlueStacks was designed for gaming, it’s also being used to test new Android apps before they’re published on Google’s Play Store – easier to test an app inside an IDE than downloading it on your smartphone.
BlueStacks is unquestionable, one of the most appreciated Android emulators out there, a fact is proven by its 400+ million user community.