Jason wants to know if using a password manager on a mobile phone is a good idea. Leo says absolutely. It will keep track of all his passwords so all he needs to do is remember one. Leo likes Last Pass, but many iPhone users prefer 1Password. Both are equally good. There's also DashLane. Any of those three will do the job. He should just make sure he creates a difficult password to crack, but one that he can remember. He should use pneumonics. He should also turn on 2 factor authentication.