I've become religious about tracking paper receipts over the last year (and can't wait until all receipts are digital). That means I've tried most of the big-name iOS receipt scanner apps. Out of all of them, an app called Piikki (US$2.99, universal) is my favorite.
On the surface, Piikki is similar to other receipt scanner apps. It photographs receipts and saves the image to your phone. But the beauty of Piikki is its tagging and archival power. Every time you photograph a receipt, it's date, time, and geolocation is saved. Users can then enter a title for each receipt, select a category the receipt falls in to, select the appropriate currency and add tags.
Piikki can archive rec
