Mirroring your Mail on iPad & iPhone

I got a quick question about mail on my iPad and iPhone.

When I read mail on my iPad it's still unread on my iPhone (and the other way around)
And when I delete mail on my iPad it's still on my iPhone (and the other way around)

is there some settings or something I can fix this with? It's annoying to do the same action on both devices.

I would like every change I do on one device to happen to the other device. Any tips?

Thanks for any help.