Related to this, I'm in the UK and use online-only supermarket Ocado. And I recently built https://ocamatic.uk/ https://ocamatic.uk/, which scrapes price histor

Related to this, I'm in the UK and use online-only supermarket Ocado. And I recently built https://ocamatic.uk/ https://ocamatic.uk/, which scrapes price history for all products. I use it to check how often a given product is on sale, for example. It also shows recent "shrinkflation" events. Maybe others will find it useful.