You can now find your preferred grocery chain on the Roadtrippers website! Rather than a filter, this works through search: turn on the Shopping category, Filter the results to Supermarkets & Groceries, then search for the store you're looking for. With a trip open, results stay within your route radius, too.

This isn't available in the mobile app yet. If you'd like to see category search on mobile, please vote and follow this request for updates: https://roadpass.canny.io/roadtrippers/p/search-within-a-category-in-the-mobile-app

Thanks for the feedback!