I use 1Pw constantly throughout the day, on my Mac, as well as iOS. I have a fairly common configuration I believe with 1 vault each for Personal, Work, and a side Consulting business. It's fairly easy to switch between vaults on the Mac using both browser extensions and 1Pw Mini. However, switching between vaults is a pain in iOS. It's like going into settings and switching the config of the entire app, definitely not streamlined!
A couple of potential enhancements:
1) Some easy shortcut, similar to the lock icon dropdown in 1Pw Mini that allows switching vaults.
2) A way to potentially combine searching in ALL vaults (without requiring the user to choose one or the other)
Maybe I'm missing a simple way to do this already, but either of the options above would be a great addition. Thanks again for multiple vault feature!