Slotrace Lite for Android
Alternative screen provides list of all laps with faster/slower indicator, the lap times can be saved and viewed later in any spreadsheet style tool.
The app connects to the track sensors using bluetooth, so no wires all over the place.
IMPORTANT: This app requires extra hardware to connect to the race track sensors. You will need an Arduino with a Bluetooth adapter, the Arduino must be running the sketch provided with the Race Coordinator software package (http://www.racecoordinator.net/), once setup either this app or Race Coordinator can connect to the sensors. At present there is no off the shelf hardware, this is intended as a DIY electronics project, see http://www.slotforum.com/forums/index.php?showtopic=115754 for more information and links on hardware.