The Australian market is "small" (pop: ~ 27 million ) and dominated by "The Big 4" supermarkets: Woolworths Group, Coles Group, ALDI, and Metcash (IGA). Together, these retailers control over 80% of the Australian supermarket sector.
Recently price collusion and artifical hiking followed by "fake" discounts (prices 'reduced' to greater than initial price just prior to fake hike) was exposed by the national consumer watchdog after being alerted by networked shoppers sharing notes and prices scrapped by themselves.
Will your app assist large groups of consumers in outing anti competitive price fixing by large chains, or do you hope to be 'captured' by large supermarket chains via advertising revenue and plaster over bad behaviour (ala any commercial outlet or influencer taking money from Harvey Norman).
Will you scrap online shopping advertising for bargains and analyse bargain patterns and creeping hikes, shrinkflation?
To be clear, I'm personally not fussed either way, but these are features that smart network savy consumers look for.