The X431 original Pad use Android OS, therefore the app for X431 adapter can be use with the Android device without X431 Pad original!
Just use my link and install it on any appropriate android.
http://www.launcheurope.de/launch/download/X-431_PADII.apk
It can work on both cars and trucks if you have the appropriate subscription.
Also, the good folks who manage x-diag pro can hook you up with the subscription to cover both trucks and cars, ie 12v and 24v.
That means: For 12v truck easydiag can work if you have files ect. But for 24v truck u will blown unit Original Xpro3 or launch devices for truck 24v use adaptor to protect unit .