Usually restaurants and cafes sell their surplus breakfast after 10:00, lunch after 14:00 and dinner after 19:00. Grocery stores often have things for sale in the app throughout the whole day!
Do you want to get notified when your favourite location has food that you can rescue? Simply follow the place in the app to get a notification when they sell food! Click on the heart icon on a location and make sure to allow notifications for the Karma app. You can follow as many locations as you like.