Any good physical address book apps?

I’m looking for a very basic mail address book app. Something like a regular address book that I can have anywhere on the cloud. I don’t give a damn about dialers or photos or anything like that. If it looks like an actual address book that would be great. I just want to be able to scroll through the entries and have all the information right there. Maybe being able to jump to different letters would be nice as well. Available on iOS and Android would be a bonus.

CoBook (not on Android though) ?