Question

Does the perception of time depend on the Mass/Height of the Observer?

Answer 1

It depends on the mass of object. It can be daily theory of relativety

Answer 2

Time passes more quickly for clocks (observers) farther up, out of a gravity well than deeper in. For example, GPS satellites all have atomic clocks. But, because they are moving there’s a Relativistic effect to slow the clocks relative to our clocks. But, because they are farther from the Earth’s center of gravity, there’s a relativistic effect that makes them run faster, relative to a clock on the Earth. As I recall, the General Relativistic term is larger so GPS satellite clocks are designed to run slower than normal clocks, to compensate.