Reading about the app some, why not use the app on the tablet with another datalogger for your car? If it has 3G/LTE built in its great for not draining your phones battery when using it for maps, web browsing, ect.
For road trips my son likes to watch movies on it as well. Tablets now a days have become more handy to have around becuase of the hardware they now pack.
Just my 2 cents. I have a Galaxy Note 10.1 and I am not going to get rid of it til I can afford the newer one that just came out![]()