The panel-mounted avionics chart subscription you purchase from Jeppesen may also include access to activate Jeppesen charts on up to 4 mobile devices. If it does, open ForeFlight and sign in using your Jeppesen credentials to activate Jeppesen charts on two iPads and/or one iPhone.
NOTE: Avionics that require an additional Jeppesen EFB access license include, but are not limited to:
-Avidyne IFD 440/540
-Garmin GNS 430/530