How did you that?....

...is the reaction I get everytime I show a track day video with overlaid data from this app. Really amazing what you can do with an iPhone.

Do yourself a favor and play around with this *before* you get to the track. If you try to set it up for the very first time 15 minutes before the call to grid, it can be too much to take in. One of my favorite tracks (ORP) has very spotty cell service, so you need to have the track downloaded and selected before you get there.

App works well as is with just a mount and a power cord, but Ive enjoyed adding a BT-1 OBDII link, a Dual GPS puck and an Olloclip wide angle lens to improve data capture and cockpit video.

Todd Peach about Harry's LapTimer Petrolhead, v17.0.6