Hi Harry, I've read that the iphone 4/4S MEMS gyroscope is pretty accurate -- have you considered generation of drift angle (yaw/slip) data? I'm not yet sure of usefulness of this data for the non-"Drifter" community although in cars such as E36, slip angles tend to be large, and might be ...

Just wondering if my iphone4 with 16GB (showing capacity as 14GB) is suitable for use in taking videos with lap timer. I am aware of the overview post with the data rates of video capture, but not sure of the practical impact during use? Sorry if topic has been covered before, just couldn't quickly ...

Excellent, thank you.

Bill

I'm not sure if this is practical, but I notice the friction circle display seems to have a relatively sluggish response. In other acquisition systems I've seen more rapid displacement of the green dot. Is there a low pass filter in effect, either in the intrinsic iphone hardware, or in Lap Timer so...