I have a 1972 172L with the RAM 160HP upgrade. Installed in the panel is a dual 10" Dynon Skyview HDX system with PS Engineering PMA450C and Avidyne IFD550 GPS/NAV/COM.
The iFly can be used for IFR as an EFB (Electronic Flight Bag - charts and approach plates). It is NOT approved as an IFR navigator. For moving map and flight planning, it is just supplemental information, not primary.