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"Tokusell" is a price comparison app that supports Rakuten Market, Amazon, and Yahoo! Shopping.
It's completely free and easy to use, and you can compare membership status, points, and shipping costs.
Products from three malls are displayed in one search, and set products can also be compared on a per-item basis.
This is an app that makes shopping on e-commerce sites easier and more convenient.

Furthermore, if you press the "barcode" button at the top right of the app startup page,
You can search the total price (including price) of three malls in one go.
Compare prices while shopping at physical stores such as supermarkets and shopping malls.
It will be much more convenient!