Did you ever dream of traveling in time?

Actually, you can - the satellites who help you find the closest route to Starbucks already do it every day. This thanks to a concept known as gravitational time dilation, explained by Einstein’s theory of general relativity.

Click to read more about Time Dilation on Wired

Unfortunately, the time travel experienced by you or a satellite is so small that it’s hardly noticeable, sometimes even measured by picto seconds - that is, one trillionth, or one millionth of one millionth of a second, or 0.000 000 000 001 seconds. But it IS nevertheless time travel, and it will accumulate during the course of your life.

So wouldn’t it be awesome if there was a way for you to keep track of your accumulated progress as a time traveler? Enters TimeTraveler, the app that help you do precisely that.

Side note

There are actually two types of time dilation:

1. Relative velocity time dilation
2. Gravitational time dilation

This app measures the first, and the second has been illustrated in the movie Interstellar.

Click to read more about the metaphysics of Interstellar on Wired

As we only measure the relative velocity time dilation, there might be a slight difference between the actual time dilation that the user experiences and the one we measure. An example of this would be the GPS satellites: one the one hand they experience a positive time dilation due to the high velocity at which they are moving. On the other hand, a part of this is cancelled out due to the lower gravitational pull in the Earth's orbit.