Sale&Investment is an app that allows you to easily understand:
1 - how much it will cost you a discounted product and how much you're saving in the purchase. Enter the price, the discount and you are immediately shown the discounted price;
2 - what your investment is raking in and how much is your gain or your loss. Enter the value of the investment, the current value will be shown immediately.
And 'possible to set the currency to U.S. dollars or euros.