Can I use my AUv3 plugins/Apps within the Sunday Keys iPad App?

For now, the answer is 'not yet'.  We're currently focused on dialing in the core App experience by adding to the included Sound Library, improving performance and reliability, and addressing popular feature requests.

We do plan to add AUv3 plugin hosting support in the future, which will allow you to use your favorite instrument AUv3 plugins as Sounds within Sunday Keys Patches.

Stay tuned for more info over the coming months.