Tony, the rest are just phones, the iPhone is just, well, more......
mine has the GasRating, RadCalcs, ExpVessel sizing Apps, plus PlumbCenter/Grahams Apps, spirit-level/plumb-bob ones too.
Read more: //www.diynot.com/forums/viewtopic.php?t=278270&start=0#ixzz1PjyER8Y2
other...