There is two ways to find and download Maestro on your iPad/iPhone:
A) Open the App Store and on the search bar type in “Apogee Maestro”. The app will come up and you can download it from there.
B) This second method requires that you connect your Apogee Interface compatible with iOS (ONE, Duet or Quartet) to your iPad/iPhone:
1) Go to Settings>General>About.
2) At the bottom of the list shown, select your interface name.
3) Go to “Find App for Accessory”, this will take you to the App Store where you will be able to download Maestro.