Pokémon GO had its first major patch posted on August 1st, 2016 for iOS and July 30th, 2016 for Android. Pokémon GO has been updated to version 0.31.0 for Android and 1.1.0 for iOS. Below are some of the release notes from this update:

- Avatars can now be re-customized from the Trainer profile screen
- Adjusted battle move damage values for some Pokémon
- Refined certain Gym animations
- Improved memory issues
- Removed footprints of nearby Pokémon
- Modified battle damage calculation
- Various bug fixes during wild Pokémon encounter
- Updates to the Pokémon details screen
- Updated achievement medal images
- Fixed issues with displaying certain map features
- Minor text fixes

Source: https://www.facebook.com/PokemonGO/posts/938713812941844