Pokémon GO is being updated to a new version across all capable iOS and Android devices. The latest update is being rolled out to iOS and Android devices, respectively. According to patch notes from the development team at Niantic, the latest update implements various bug fixes and improvements for an overall smoother experience.
What’s New in Version 1.165.0 (iOS)
What’s New in Version 0.197.1 (Android)
There’s always something new in Pokémon GO!
– Celebrate different regions of the Pokémon world in January as we count down to Pokémon GO Tour: Kanto!
– A new year means new challenges, and in that spirit we’re introducing a new feature—Collection Challenges! These challenges provide a handy guide to catching Pokémon featured during in-game events.
– You can now search your collection for Pokémon powered up with Candy XL.
– We’ve made improvements to Egg storage and Pokémon tagging.
Source: Official Pokémon GO support page