MainStage features an incredibly deep Sound Library, virtual instruments, amazing effects, and a massive collection of plug-ins and sounds.
Logic Pro features an incredibly deep Sound Library, virtual instruments, amazing effects, and a massive collection of plug-ins and sounds.
The App Store gives developers a safe and trusted platform to build, market, and distribute their apps and grow their business around the world.
https://www.apple.com/app-store/developing-for-the-app-store/