Symphony Pro for iOS
Adonit Note +
Are there any plans to support the Adonit note + shortcuts buttons?
In general, if the stylus pairs with your iPad, it should work nicely with SP. Improved compatibility and feature support with Adonit Bluetooth devices are on the way for version 6.0 as well. However, shortcut buttons won't be supported yet, but they're now in consideration for 6.1 or 6.2.