お買い得メモ is a useful app for everyday shopping. It helps users keep track of the best prices, lowest prices, and special deals for products. With this app, users can easily remember the prices they consider to be a good deal and the lowest prices they have seen. It also allows users to make notes about the store and quantity or volume of the products, making it easy to calculate the price per unit and compare prices between different stores. The app supports both tax-inclusive and tax-exclusive prices, with a simple toggle button to switch between the two. It offers various features such as the ability to add specific product names, manufacturers, and photos, as well as organize products into groups and search for specific items. The app is free to use and is available on iPhone.