I’d like to second the notion that it takes too many clicks to switch vaults on mobile. This would be a simple improvement.
However, it’s possible to remove one more tap from the process by copying how Slack treats servers:
- Vaults are assigned in order to keyboard shortcuts like cmd-1, cmd-2. (modifiers may be necessary)
- When swiping from the left, the vaults are enumerated vertically with icons. Tapping on them switches directly.
- To delete vaults or rename them, you could long press on the item. Depending on the exact layout, you could imagine using a kebab menu or something similar instead.
One other alternative would be to show a native iOS contextual menu when holding the Vault button down, with the vaults listed. This could be a good balance between being quick to implement and fast to use.