The main reason why we decided to change to bottom navigation is to improve discoverability of features. The percentage of users navigating to Spending or sending money at least once was lower on Android than iOS, so we hope that switching to bottom navigation will improve this. Most key features are now reachable with a single tap, while before they were hidden behind the navigation drawer or the multiple actions FAB.
Whether it looks “iOSy” or not it’s more of a personal opinion. It’s true that bottom tabs is a more common pattern on iOS. However it has also been part of the Material design guidelines for a while and it’s used by many popular apps on Android, e.g. Google Photos, Youtube or Instagram. We aimed to follow the material design guidelines when implementing bottom navigation so the look and feel is similar to other Android apps using bottom tabs.
I know it’s a bit different and it can take a while to get used to, but hopefully it makes navigating much easier than before 