C4Timekeeper

C4Timekeeper is a professional stopwatch app designed specifically for timekeepers managing Oldtimer Rallye events. Replace expensive traditional stopwatches with this cost-effective mobile solution that streamlines time control operations from start to finish.

Capture split times with precision using the intuitive green Start button, volume keys, or optional external Bluetooth and USB buttons. Connect a photocell sensor to your external button for automated timing at control points—ideal for secret time checkpoints where manual operation isn't practical. Every timing is recorded instantly and accurately, eliminating delays and human error during event management.

Synchronize your device clock with three reliable methods to ensure perfect accuracy: manual sync using the organizer's reference time, atomic time from global or regional servers, or GPS satellite time. This flexibility guarantees your measurements remain consistent across the entire event, regardless of location or conditions.

Streamline post-event workflows by sending all recorded times directly to organizers via email. Organizers can begin evaluations immediately without waiting for the timekeeper to return with physical records or separate devices. This real-time data sharing accelerates the entire rally management process.

The free version supports up to five timed stops—perfect for testing or smaller events. Multiple language support in German, Italian, and English ensures accessibility for international rally teams and organizers.

C4Timekeeper transforms rally timing from a logistical challenge into a seamless digital operation, saving time and eliminating the expense of dedicated timing equipment.