It's safe to say that the Walk Against Humanity app will not be for everyone. That seems to be the goal of the people behind it. The app, available for both iOS and Android, is a snarky fitness tracker. It records your walks and runs and then pokes fun at you in the feedback. The teasing is done in good spirit, although some people will probably grow tired of being called a lazy bum after busting out a long run. For those folks the Walk Against Humanity app has a sort of "nice" mode that provides fun facts instead of snark.
The app features a leaderboard and issues badges, in addition to its taunting element. While Walk Against Humanity app won't be for everyone it should appeal to those who are tired of bland fitness apps and motivational quotes.