Here’s all the new stuff in Android ver. 0.31.0 / iOS ver. 1.1.0:
A new warning/notice appears every time the app is launched
Your trainer avatar can now be changed at will (including gender)!
New icons for some badges
Removed footprints from “Nearby” menu
New/smoother animations when entering battle
New pokeball model
Added text each time a Pokemon breaks out of a pokeball
Removed location from Pokemon status screen
New menu/easier way to transfer Pokemon
There were also some bug fixes and minor text changes. The text in the Pokemon menu for each Pokemon’s name is now more bold.
There were also some improvements to certain gym animations as well as some battle and attack power changes, but I haven’t had a chance to check that out yet.