trackaddict on a android.
It is a bit wonky but after a few test runs you get the hang of it.
It will video tape each run. When you are set to go press the record button and it waits for movement to start recording. I had mine flat in the seat.
on my first run it thought I ended the run off the coast of Africa and said my average speed was 1,324,203 mph. but it did capture data through 1/4 mile.