Considering Pokémon Go's user base is about to surpass that of Twitter, at least among Android users, the potential for the game as a form of therapy for those living with depression, social anxiety, agoraphobia and similar mental health disorders would appear to be substantial. 

"The developers behind Pokémon Go didn't mean to create a mental health gaming app," psychologist John M. Grobol wrote for his site, PsychCentral. "But they've done so, and the effects seem to be largely positive."

Grobol cites the positive effect of exercise for people with depression, who have the hardest times motivating themselves to be active. "For a person suffering from depression or another mood disorder, the idea of exercise can be nearly impossible to contemplate, much less do," he wrote. "For someone suffering from social anxiety, the idea of going outside and possibly bumping into others that may want to talk to you is daunting."

But by involving these people in a game, Pokémon Go has incentivized physical activity and social participation, making a trip outdoors seem like a fun prospect, rather than frightening one.