Psst is a shared shopping list, but the useful part is that it remembers what you paid. Photograph a receipt and the lines come back structured. Each line shows a crop of the row it came from, what that item cost last time, and where you bought it. A lot of the work went into knowing when not to be sure. Two prices in different units are never compared, and comparisons are based on unit price, not the line total. Buying 2kg instead of 1kg is not treated as a price rise. Psst is available on iOS and Android.
