Pole Lap Logger: Lap Timer

Pole Lap Logger is a lap timer for track days, built by one amateur racer for his own driving. iOS first, no ads.
What the videos show: laps played back after the session, two laps side by side, the line coloured green where the throttle opened and red where the brakes went on, and the delta showing which corner made the difference.
The phone's own GPS is enough to start. A Bluetooth LE receiver sharpens the numbers. Recording, playback, comparison and export are free; Premium lifts the cap of two saved sessions.
Nothing here is recorded while driving. Times come from GPS. This is not an official timing device.
polelaplogger.com