Date and time stamp on an iphone pic?

My friend is having some problems with another person. She borrowed the other person's truck and they are trying to tell her that she owes them like $60 in gas money. She took a pic of the quarter tank she was left with but, the other person is trying to say she took that after she had used it.So, I was thinking a date and time stamp on the pic would prove that she doesn't owe her any extra gas money but, she's got an iphone and doesn't know how to get the picture info. I don't have an iphone so, I wouldn't even know… Does anyone know how to retrieve the picture info? I have it on my phone and I figure the iphone is more advanced than mine, so it should have it too. Tks!
ps. Try to sell me things or advertise bs, I will report you… I hate spammers! I had like 3 of them today!

Standard rule of life #6: When someone is nice enough to lend you their vehicle, you ALWAYS return it with a FULL tank of fuel regardless of how much was in it when they gave you the keys. No exceptions. Therefore the date & time stamp of the picture is irrelevant.