I've spent this weekend looking into ways to organize my tobacco. I tried every iOS app because I REALLY want to do this with my iPhone. I've discovered the most perfectly simple yet elegant solution. It allows you to create whatever categories you wish while allowing you to pick the type of input each chosen category requires, be it a date, barcode, text, whatever. Here are a few screen grabs to give you an idea. It's completely custom so you can add as many categories and subcategories as you wish. Once setup, it's a simple matter of either scanning barcode or taking a photo of a tin, filling in blanks and done.