Can you use it as a password manager for things that are not websites as well? And is there a way to associate additional data together with the passwords, such as answers to security questions?
Those were the two main things that made me use a separate password manager app in the first place.
No to both of these. There are only three fields, and they must all be filled in: URL, username, password. But suppose your bank is HSBC, you could, make up something like "securityquestion://www.hsbc.com", "mom's name", "Jane Doe".