Users are asked to share their location with Tinder so the app can recommend people within a certain distance. To make that feature work, Tinder has to record the last known location of each user.
Serotonin is known to be the most responsible in terms of neurotransmitters and depression. Serotonin is responsible for an array of functions most importantly being the mood and perception of a person.
It is unknown whether changes in levels of neurotransmitters cause the development of depression or depression causes changes in neurotransmitters. It may happen both ways. Researchers believe that our behavior can affect our brain chemistry, and that brain chemistry can affect behavior.