Clarity about 1Password for Mac: Is it 1 or 7, 8 or even 9?

That's really helpful and I thank you. Since posting my bad tempered query, (sorry!!) I am beginning to realise that importing the 1Password 7 data into OS Passwords (aka Keychain) for my wife, is not so straightforward or even reliable. I'm torn between the devil and the deep blue sea! She really finds managing both passwords systems impossible, so I'm trying to go for simplicity. My wife will never require access to platforms other than Apple so the cost is another aspect I must consider. Your advice is welcome and gratefully received.