I've been employing my own "tripper pad" for a few years, now. I use a hand-me-down cell phone onto which I've downloaded a tracking app called SkiTrax. There are several apps like that one available online for pennies.
I set it to track myself, which it does, as I travel. It tracks my elevation, speed, and distance travelled in real time.
Because my cell phone has a gps function built in, I can see exactly where I am at any time just as if I am looking down at myself from some high elevation location...not just the road, but the topography, too, just like a photograph.
I use it to see how close I might be to fishing lakes as I travel logging roads here in the British Columbia interior region.
I save the records of those trips so I can look at them using Google Earth later on my laptop.
If the Tripper feature can do all that, it'l be a cool feature, unless you just don't need it. I don't need it because I've found a very good substitute.