My app will allow users to search for every day products and instantly compare prices across different stores, helping them identify the cheapest option available. I just want to know how to make it so that it identifies the product, the cheapest possible price and in which store it is available. How will this correlate to the screens? Do I have to create screens for each product?
Never code data into your app.
Always keep it in a database somewhere.
If your app uses any API to search products OR if your app is a multivendor shopping app then please elaborate more what you want to achieve. If your app is a place where same product is listed by multiple sellers then you need to search it, then compare the price, then sort it and show it in list lowest to highest pricing using math compare block < > =.