 In December 2015, Play Books was updated to include a "Night Light" feature that "gradually filters blue light from your screen, replacing it with a warm, amber light as the sun sets".Google claims that Night Light "automatically adapts to the amount of natural sunlight outside based on the time of day, giving you just the right temperature and brightness".In July 2016, Play Books was updated with "Bubble Zoom", a machine learning imaging feature that recognizes objects in comics and "expands the speech bubbles of a comic one-tap-at-a-time, making them super easy to read on your mobile device".