How can I see the log history of my iPhone 6 from an Android?
There's 2 ways to check the call history:


Look at the Recent tab in the Phone app.  This will tell you the numbers she's called and when she called.  To do this you need to have the physical iPhone with you and access to the Phone app.
Review the call log from your cell provider.  Almost all major cell providers allow you to log into your account from any browser or their app and review the call and text history.