Pokémon Go's first substantial update adds tweaks for overpowered Pokemon (those consistently at the top of Pokemon gyms: cough, Vaporean, cough), where the critters can be found, and a raft of bug and text fixes. Niantic has decided to drop the footprint tracking system that didn't even work in the debut iteration of the game; you'll have to make do with the vague list of nearby Pokémon. And pray. The update also nixed the battery-saving feature (update: on iOS only), although this editor and others found that feature often made the app unresponsive. Your mileage may have varied, but regardless, battery-saving mode is no more. So turn that screen brightness down, and definitely bring your portable battery pack on your Pokémon hunts.