abstract:DRO providing a three axis display with pitch circle calculator, diameter/radius conversion, absolute and incremental toggle, and inch metric toggle
Idon'tmindbuyinganexpensivecar, but I do mind standing at a fillingstationwatchingthedigitalread-out adding noughts to my credit-card bill foratankfulof something I can't even see.
It utilizes a phone's digital compass, and readout the direction the user is facing, something that is apparently very important when navigating through public transport, while the audio component opens up Google Map features in a non-visual way.