Useless without instructions

This MAY be a powerful app, but it is difficult to tell because there are no instructions on how to use it. The website shows some neat screenshots, but I have no idea how they were achieved. While I do get some instant data I cant figure out how to get the track mapping and lap timing shown on the website. The stilted English doesnt help. I tried using it in my racecar once and only got wrong data. I know my MG Midget doesnt go 212 MPH as much as might want it to! I also could not figure out how to keep it running for any meaningful length of time, as another review noted. And why must I agree to the license EVERY TIME I launch the app? I wish I could either get my 4.99 back or get some instructions that might unlock all the secrets that are hiding in this app.

The Stig Again about Harry's LapTimer Rookie