The 817 Companion will put your little radio on steroids but adding:
logging possibilities (with ADIF and CSV export)
automatic eQSL sending (as soon as you log a QSO, the app sends the eQSL)
automatic query to QRZ.com to fill in data (name, QTH, locator)
automatic calculation of the distance and bearing
automatic frequency scanning up or down from 1Hz to 100Mhz at the time
a beautiful audio spectrum/waterfall with touch QSY
it supports the use of “panadapter” kit that allows to use the 817 as an SDR with up to 24kHz bandwidth (contact me if you want more info about that!)
antenna tuning with a single press of a display button
real time DX Cluster spots with touch QSY, filtering and alerts!
10 frequency memories for each band (a total of 140 memories!). Each one can be customized with a label and a color
and more…
http://817companion.com/