I want a clock partially tied to gps that purely measures my dead reckoning movement along with a universal lock as near as we can tell. A causal wristwatch th

I want a clock partially tied to gps that purely measures my dead reckoning movement along with a universal lock as near as we can tell. A causal wristwatch that purely lets me label my self relative increments. I'd allow cesium oscillations on my person as well I guess. We can all then crdt ourselves together for group interactions or I can just live on my own branch.