The climate crisis requires changes from everyone. We want to help consumers, to make a real impact with just their regular grocery shopping. With means of gamification and community influence, we encourage more sustainable and healthy choices, without any loss of convenience.

Our solution consists of three elements. The first part is a self-scanning app, which is already a popular method of shopping in Switzerland. Additionally to the price of the scanned products, the users instantly get a sustainability and health rating which are based on the ingredients and the CO2 data from eaternity. After the fully digital checkout, the user's personal score is updated in the second view of our app. Here, users can track their progress in reducing CO2 emissions and benefit from special rewards. And by making local communities an integral part, we encourage everyone to take action and improve not only their personal choices but to also bring changes to the community as a whole.

But how did we do all of this? Our backend is built using nestjs. It stores anonymous information about the users in the database and queries the provided data API's. In order to obtain information about the scanned products, we query the migros product api which provides the name, images, ingredients and for example the country of origin. This information is then used to query the IBM eaternity API in order to get an estimated amount of CO2 the given product costs. All of this is then provided to the frontend when the EAN barcode of a product is scanned. The color of the leaf changes according to the amount of CO2 released and the user is able to obtain even more information by touching the product in the list. And since the phone already stores all information about the products being purchased, a qr code can be generated to provide the data to the checkout system. Even more importantly this could be used as a universal standard allowing for a more widespread use of the own phone for self-scanning and self-checkout and keep our CO2 emmisions in check. We imagined exploiting the so-called Kantönligeist of swiss people by creating a scoreboard on which cities or cantons buy more ecological products. A map allows for direct comparisons with neighbouring cities creating a competition between them.
Last but definitely not least, the first screen of the app displays the personal progress over time. Seeing the emissions drop after changing one's habit is a satisfying feeling which the usual actions for climate cannot provide since the result in the real world is only visible after a long period of time.

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