When apps use streaks and badges, they tap into our natural desire for...
https://www.tumblr.com/gladlyradiantsphinx/819598402316812288/why-do-i-feel-like-content-is-engineered-now
When apps use streaks and badges, they tap into our natural desire for progress. These small nudges turn a daily habit into a rewarding routine, making it easier to stay caught up on the news that matters to you