The "Product Search Price Comparison App Smart Shopping" is a free iPhone application developed by Ryuma Ando. It allows users to search for products across multiple online shopping and auction sites, enabling them to compare prices and find the best deals effortlessly. Launched in 2012, this app is the mobile version of the web service of the same name, with the motto "Making shopping more convenient."

Users can search for products by keywords or categories and even compare prices by scanning product barcodes with the camera. It provides quick access to information such as product availability on major e-commerce platforms, prices, and user reviews, making it a handy tool for smart shopping decisions.