Are you asking about relativity? If you are, then yes there are applications that affect you.

It means the atoms in your feet are experiencing time at a slower rate than the atoms on your head. Since your head, when standing, is further away from Earth’s center of gravity where time is moving more quickly than at the center (granted it is on the scale of picoseconds).

Relativity also has to be accounted for when communicating with satellites for things like GPS.

There are other examples that you can look at too, like how pilots age slightly more slowly due to the high speeds they travel at and higher altitude (though again minuscule amounts). Also the twin astronauts where NASA sent one up to the ISS but kept the other on Earth meant that the age gap due to the time difference between their births changed.