I promise they have win+iOS. iMessage is the only reason that I have an iPhone. Well, that and the inability for any other messaging service to provide reliable real-time messaging with read receipts (both critical for core-family safety reasons; friends and work colleagues get my GVoice number which, ironically, worked better on iOS than Android at the time I switched).

As a bonus, my F-I-L currently uses the Notes app as his vault (not the secure version, just a note entitled "Passwords") and my mother uses a combination of several slips of paper floating about her office, Google Chrome's internal password memory system, and a system involving her dog's name, a site identifier, and the last four digits of a phone number she had as a child. That last one is pretty good, except that the old bird is really bad at remembering which letters she capitalizes and which part of the URL she's going t use as the identifier, so some sites are just easier for her to get a password reset every time she uses them. I'm actually getting jittery just thinking about it.