This app was mentioned in 2 comments, with an average of 1.00 upvote
https://play.google.com/store/apps/details?id=com.mtgprice.mtgpriceapp&hl=en
will have F2F prices on it within a week or so (the main site will have then in two days).
When I get some free time, I'll finish https://play.google.com/store/apps/details?id=com.mtgprice.mtgpriceapp&hl=en - it works right now but it's still clunkier than I would like.