A method for determining product price information, includes capturing a data signal including image data, voice data, and/or keypad input data, the captured data signal including information related to a price of a product, to a point of retail of the product and to a type of the product; determining metadata including a geographic position of the capturing and a time of the capturing; determining a piece of product price information including the type of the product, the price of the product, and the point of retail by analyzing the captured data signal; determining credibility data of the piece of product price information; and including the piece of product price information, the metadata and the respective credibility data into a database.