This app was mentioned in 1 comment, with an average of 5.00 upvotes
OK /u/divron94. This is my take on your idea: Instant Discounter.
I knocked it out in a couple of hours this afternoon after I'd finished a different project. It was rejected on first submission as it mentioned 'Best Buy' in the description, but all sorted now. I've done some limited testing on my own device & it seems to work pretty well. YMMV.
This is the first release - there are no preferences for the buttons yet - I will probably add that when I look at it again next week.