Katya - So if the calculation said find users within 1 mile versus find users within 100 miles would it be quicker and less of a drain on the phone battery due to not as many calculations?

Thank you Katya.

Do you think it would be more practical to have users "check-in" to a location and calculates the distances based off those "checked-in" locations?

Tinder was probably a poor example. Please ignore...

If a user logs in to an app from their phone, how could you find all the users around them that are within X miles? Currently have the users logging in through Facebook API if that changes anything.

Thank you.

I would like to display the distance between the user and other users.

Using tinder as an example, how do you calculate the distance between the two users.

Thank you!