I first bought SampleTank (the desktop version) about 3 years ago. It was a solid workstation back then, so I was excited to hear it was making its way into iOS. After getting some experience with the app, what stood out the most are the quality of the sounds and the amount of sounds it comes with. You’ll get 136 instruments with the opportunity to expand with additional purchases. These expansions are reasonably priced at $4.99 and compliment the program nicely.