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 1.147.0 (iOS)
NEW: Tickets to Pokémon GO Fest 2020 are now available in the in-app shop! A global event like you’ve never seen before awaits!
What’s New in Version 0.181.0 (Android)
NEW: Tickets to Pokémon GO Fest 2020 are now available in the in-app shop! A global event like you’ve never seen before awaits!
Source: Official Pokémon GO support page