Why you keep a lot of papers to know and remind items cost. Now with Smart Invoice App you can keep all your invoices in your phone in an e invoice. You can quickly find which invoic e you want by invoice date, invoice number or vendor/supplier name. it is an invoice app and it's free invoice generator You will easily know the price of the item or the quantity you purchased. You can apply the smart invoice to keep an e invoice from all the invoices of your shop or business within your mobile