When we built SAVR, the premise was simple: grocery prices vary more than people think, and if you check before you shop you'll almost always find a better deal. But I didn't know how much prices shift from week to week until we started looking at our own data.
From January 1 to May 12, 2026, our platform recorded thousands of price observations across Ontario retailers. We looked at which stores had the lowest price most often, broken down by category and week. The short version: the winner changes constantly, and no single banner dominates.
Produce
Produce includes: apple, banana, lettuce, tomato, carrot, broccoli, spinach, onion, pepper, berry, berries, grape, cucumber, zucchini, avocado, mango, orange, lemon, lime
Dairy & Eggs
Dairy & Eggs includes: milk, cheese, yogurt, butter, cream, sour cream, cottage cheese, eggs
Meat & Seafood
Meat & Seafood includes: chicken, beef, pork, ground, steak, sausage, bacon, turkey, lamb, fish, salmon, shrimp
Pantry
Pantry includes: pasta, rice, bread, flour, oil, sauce, cereal, soup, beans, lentil, canned, crackers, peanut butter, jam, ketchup, mustard, vinegar, sugar, salt
Conclusion
The idea that you can pick one discount banner and always get the best price doesn't hold up in the data. Across all four categories, the weekly leader rotates. Produce is essentially unpredictable. Even in Pantry, Walmart's strongest category, they lose to FreshCo, Foodbasics, and Metro in multiple weeks. The median SAVR user saved $7.08 (26.4%) per comparison session just by checking prices before they went. That's the whole point of the tool.
Data covers January 1 to May 12, 2026 from user-initiated price comparisons on savr.app. Over that period, SAVR users ran 1,357 grocery list comparisons, surfacing a median savings of $7.06 per list on a median 7 item list, or 26.1% off the highest price in each comparison set. Win rate = share of item-level comparisons where a store had the lowest price in a given week and category. Ties are permitted. Categories assigned by keyword matching of search terms. Full methodology available on request.