I was under the impression that iOS apps can only talk directly to Bluetooth Low Energy devices, not Bluetooth 2.1. Your Kickstarter page only mentions Bluetooth 2.1 support. What am I missing?
No, I'm referring to "external-accessory". This works with both dock connector and Bluetooth iAP accessories. You're right that the other one is only for BT LE (4.0). It's understandable that many people are confused about the CoreBluetooth vs MFi Bluetooth.