I probably knew this before but I was amazed and a bit shocked.
I was searching for how much I paid for something in NZD (that was bought in USD, I didn't know when it was charged, as it was a massdrop thing) ... typed in 'massdrop' into iOS gmail app
ANd my credit card email appeared. Surely not! I thought. Opened the attachment and there it was.
Maybe could turn this into a google hack thread?