Palm'n'Stein Logger for Palm OS 3.5 (or later).

"the most feature packed Palm OS based OBD-II and ALDL data logger available!"

Buy Palm'n'Stein with cable for OBD-II vehicles $185

Buy Palm'n'Stein (no cable) $100

System requirements:

Release history (link)

Features (comparison chart):

Performance (comparison chart):

The logging performance has been optimized to provide some of the highest levels of performance, regardless of the protocol or vehicle.

The logger software is self tuning. It adjusts it's rate to the fastest possible rate that can be RELIABLY used to acquire data.