TSD Rally Computer

TSD Rally Computer is a precision navigation app for time-speed-distance road rallies. Turn your phone into a calibrated rally tripmeter that tracks distance, average speed, and target time so you can stay exactly on schedule. It features clear, high-contrast readouts, quick corrections, and tools tuned for real-world rally conditions. Core features: - GPS-based odometer with calibration factor and quick distance corrections - Real-time average speed, CAST management, and early/late indicators with visual alerts - Stage tools including start, pause, reset, checkpoint logging, dual trip, and dark mode Ideal for TSD, classic car rallies, regularity stages, and training. Keywords: TSD rally computer, rally tripmeter, GPS odometer, motorsport navigation, average speed, checkpoint timer.

1. Download and open the app, grant Location permission, and choose your units and display preferences. 2. Calibrate the odometer by driving a known distance or entering a calibration factor to match the event’s reference. 3. Create a rally and stage, set the start time, enter CAST speeds, and define any planned pauses or resets. 4. Start the stage at the official time, monitor trip distance and early/late status, and adjust CAST or apply distance/time corrections as needed. 5. At checkpoints and controls, use Reset and Mark to log times, pause when instructed, then resume; review splits and save your results after the stage.