When several supermarkets seem possible, the fastest approach is not opening every app. It is choosing the first store based on basket strength.

One cheap promotion can make a supermarket look stronger than it really is. But if your basket includes detergent, tissue, eggs, milk, rice, cooking oil, or family items, the total decision should come from the categories you repeatedly buy together. Priceory is most useful when it helps you judge that bigger picture.
If your home is breakfast-heavy, compare milk, coffee, biscuits, bread, cereal, and eggs first. If your pain point is household spending, compare detergent, tissue, toilet roll, and cleaning basics. If your pantry drives the budget, start with rice and cooking oil. The first supermarket to check should depend on the basket, not on habit.
You do not need to evaluate every store equally. Pick two or three anchor categories and see which stores are consistently competitive. That usually narrows the shortlist quickly. Once a store looks weak on your anchor categories, you often do not need to check the rest of its basket in detail.
Most households do not want more data. They want fewer bad options. The right first store is the one most likely to keep the whole basket under control, so you spend less time comparing and less energy second-guessing the final trip.