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Story summary
- Dairy farmer Duff launched the CheckMyTrolley app to compare supermarket prices.
- Duff saved $148 in one month using the app.
- Student Lara Bishell saved $100 in a month, including $3 cheaper tofu at a rival store.
- Tim Hong plans an online-checkout feature and says Foodstuffs and Woolworths have not raised concerns about the scraped data.
