There's this one which got some publicity, doesn't seem to be updated any more but it worked for all these retailers listed and is open source: https://github.c

There's this one which got some publicity, doesn't seem to be updated any more but it worked for all these retailers listed and is open source: https://github.com/badlogic/heissepreise https://github.com/badlogic/heissepreise https://www.supermarkt.at https://www.supermarkt.at https://preisrunter.at https://preisrunter.at https://sparpionier.com https://sparpionier.com