iFly runs on iPads, Android tablets, and Windows devices, in addition to the iFly-specific devices like the 700 and the 740.
I'm not familiar with the uAvionix line of products, but from your original post it sounds like maybe your current uAvionix product only supports ADSB-out and you're considering a new ADSB-in device that includes traffic. If you're buying a new ADSB-in device, there are many to choose from that are iFly-compatible. Make sure you choose one that provides full ADSB-in support of both traffic and weather (most do, but I think there are some uAvionix devices that only support traffic).