Honest grocery price comparison, built by shoppers.
The cheapest supermarket isn't a single answer — it depends on what's actually in your basket. Here's how Tallywise works that out, and what it means for the shop you do every week.
Why grocery prices vary so much.
A 2L bottle of milk, a six-pack of eggs, a loaf of sliced pan — the same items cost noticeably different amounts across supermarkets, and the gaps shift week to week. A few common reasons:
Promotions don't sit still
The "3 for €5" tonight is the "2 for €4" next week. Each chain runs its own cycle, so the cheapest shop for your regular basket flips around in ways nobody's tracking by hand.
Own-brand vs. branded
Own-brand items at one shop can't be bought at another, so a basket heavy on one chain's own range simply isn't comparable like-for-like with another. Branded items are — and that's where the headline savings live.
Pack sizes and per-unit pricing
A 500g pack in one shop versus 400g in another isn't a straight comparison. Per-kg or per-litre is the only honest way to look at it — and shelf labels almost always have it, if you know to look.
How Tallywise builds the price picture.
Tallywise is crowd-sourced. Every shopper who scans a barcode in front of a shelf or snaps a receipt adds one more data point. Those data points are tagged with the shop and the time, so the picture stays fresh — and the more people scan, the sharper the comparison for everyone.
We don't scrape supermarket websites — their terms of service don't allow it, and the data wouldn't always match what's on the shelf anyway. Real receipts and real shelf-label scans are the source of truth.
The honest-comparison rule.
Tallywise never silently drops a missing item from a comparison. If you've put a branded loaf in your basket and a shop doesn't stock it, that shop's column shows "not available here" — not a quietly-lower total that makes it look cheaper than it is. Same with own-brand items: they only price up at the store that sells them. The math at the till is what matters; we make sure Tallywise's math matches.
Which supermarkets are covered?
- Tesco — calibrated receipt reader, full comparison (UK & Ireland).
- Dunnes Stores — calibrated, plus coupon support.
- SuperValu — calibrated.
- Aldi and Lidl — calibrated (paper + Lidl Plus digital).
- M&S, Centra, SPAR / EuroSpar — calibrated.
- UK chains — Sainsbury's, Asda, Morrisons and more.
Tallywise is live in Ireland, the UK, Belgium and the Netherlands — Delhaize, Carrefour and Jumbo in Belgium, and Albert Heijn, Jumbo and Plus in the Netherlands, alongside Aldi and Lidl across them all. New chains land as we get enough sample receipts to calibrate the reader. If a shop you use isn't here, snap a receipt anyway and tap "Report a problem" — that's how we add one.
Find your cheapest basket.
Tallywise is free on iPhone and Android.