What app is that? i use my phone as a speedo for both my cars since they are off with trans/gear changes. I bought a cheap bore scope off ebay that might be better than sticking your phone in a furnace. Wifi and all. Pretty cool. Takes suprisingly good pictures. I like the things i can do with my phone. Control lights, thermostats, look at my security cams, etc. probably either phone would work for me, but work provides my phone.