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.