I have been looking at the popular password mangers like Lastpass, Dashlane, and Password1. The websites haven't helped me be able to figure out if my wife and I both need separate accounts or we can share one. Many, but not all of the sites we visit are the same with the same password. We would such across 4 devices between us. Any recommendations? We use mac and iOS. On another front, what's a good way to develop a strong but easy to remember master password for these apps? Thanks.