I’m using a Borgelt Bluetooth blade, which combines FLARM and Vario data and sends them combined bluetooth, with Lenovo TAB 7 XCSoar Works very well with a minimum of configuration.
The Borgelt blade can handle up to 3 data sources, combine them and forward on Bluetooth. I carry a stand-alone Sony Z3 as a fully independent back up..

Mike pre configures the devices for the blade when you order.