Uses your phone's GPS to measure the real time dilation you accumulate from
movement (SR) and altitude (GR). Open this on a phone, hit start, and let
it run. Numbers are tiny but they're real — the same physics that runs your
GPS. ← back to sim
Idle. Press start.
Net dilation accumulated
+0.00 zs
Relative to a person standing still at sea level.
SR — movement (slows you)
−0.00 zs
GR — altitude (speeds you)
+0.00 zs
current speed— m/s
current altitude (WGS84)— m
GPS accuracy (horizontal)— m
samples logged0
tracking time0 s
For scale
ISS astronaut, 1 day in orbit~28 ns slow
Cosmonaut Krikalev, lifetime record~20 ms (the human max)