The Best Grocery Price Comparison Apps in the UK, Ranked
Grocery price comparison apps have had a rough decade. MySupermarket, which was the default for years, closed. Several of the tools that replaced it compare individual products rather than a whole shop, and almost none of them handle loyalty pricing, which is where a growing share of UK supermarket discounting now lives. That matters more than it used to. When we priced protein staples across Aldi and Tesco, Tesco's Clubcard price was lower than its shelf price on a good proportion of the basket, and any comparison that ignores that is comparing the wrong numbers. Here are the tools that genuinely work in 2026, ranked by how much of the job each one actually does.
Remy
Remy approaches the problem from the other end. Rather than asking what one product costs in six shops, it takes a recipe or a meal plan, turns it into a complete shopping list, and prices that whole basket across the supermarkets you actually use, currently Tesco, Sainsbury's, Asda, Morrisons, Aldi and M&S in the UK.
That is the question most people are really asking: not whether this tin is 4p cheaper somewhere, but what this week's cooking will cost and where. Because the list is built from recipes, the quantities are the ones you need rather than the ones you guessed at. Verdict: the only option here that compares a full basket rather than a single line, which is the comparison that changes what you spend.
Trolley.co.uk
Trolley is the most capable free product-level tool in the UK and the closest thing to a MySupermarket successor. It tracks thousands of products updated daily, keeps price history so you can see whether a deal is actually a deal, and covers shops that the others skip entirely, including Boots and Home Bargains. There is a Chrome extension as well as the website.
Its limitations are specific and worth knowing: it checks products one at a time rather than totalling a basket, and it has no loyalty price toggle, so Clubcard and Nectar prices are outside its view. Verdict: the best free tool for answering whether one product is cheaper elsewhere, and the one to use for price history.
Superizon
Superizon is a free app built around search and barcode scanning, which makes it the most useful of these while you are physically standing in a shop. It covers Tesco, Asda, Sainsbury's, Iceland, Morrisons, Ocado, Waitrose and Aldi, with no signup fee.
Two gaps matter. It does not cover Lidl, and it does not show Tesco Clubcard prices, which means it can tell you Tesco is dearer when, for a Clubcard holder, it is not. Verdict: the best in-aisle scanner, provided you remember to check the loyalty price yourself before trusting the verdict.
Latest Deals
Latest Deals is a free app that does product price comparison alongside a broader deals and voucher feed, covering Tesco, Asda, Sainsbury's, Morrisons, Iceland and Waitrose. The community element means you will also see flagged clearance and glitch prices, which the pure comparison tools do not surface.
The coverage gap here is the significant one: no Aldi and no Lidl. Given that the discounters are regularly the cheapest option on staples, a comparison that omits both is answering a narrower question than it appears to. Verdict: worth having for the deals feed rather than for the comparison itself.
Which? basket comparison
Which? runs the most methodologically serious comparison in the UK, tracking daily prices across Asda, Tesco, Morrisons, Sainsbury's, Waitrose, Ocado, Aldi and Lidl and publishing a monthly trolley total. If you want a defensible answer to which supermarket is cheapest overall, this is the source journalists cite.
It is also the least useful for a specific shop. The comparison tool sits behind a paid membership, and it tracks a fixed basket of items rather than the things in yours, so it tells you about the market rather than about your trolley. Verdict: the most trustworthy overall verdict, the least helpful for the shop you are about to do.
The loyalty price problem nobody has solved
This is the gap running underneath the whole category. A growing share of UK supermarket discounting is now delivered through loyalty schemes rather than shelf prices, and most comparison tools either ignore those prices or cannot access them.
When we priced a basket of protein staples at Aldi and Tesco in October 2026, Tesco's Clubcard price undercut its own shelf price on a meaningful part of the basket. Comparing Aldi's everyday price against Tesco's shelf price makes Aldi look better than it is for a Clubcard holder; comparing it against the Clubcard price is unfair the other way. Until a tool lets you toggle that, treat every comparison as approximate and check the loyalty price on anything expensive.
How to choose between them
If you want to know whether one item is cheaper somewhere else, use Trolley, or Superizon if you are in the shop. If you want an authoritative view of which supermarket is cheapest in general, Which? is the one worth paying for. If you want to know what this week's cooking will cost, a product-level tool cannot answer that, because the answer depends on quantities you have not worked out yet.
The most common mistake is treating these as interchangeable. They answer three different questions, and the one that actually moves your weekly spend is the third one. Decide which question you have before picking the tool.
The honest summary of this category is that most grocery price comparison apps answer a smaller question than the one you had. Checking whether a jar is cheaper at Asda is useful; knowing what Thursday's dinner costs across six supermarkets is the thing that changes your bill. Remy builds the list from the cooking and prices the whole basket, which is the comparison worth having before you shop rather than after.
Frequently asked questions
What replaced MySupermarket in the UK?
No single tool did. Trolley.co.uk is the closest free successor for product-level comparison, Superizon and Latest Deals cover similar ground as apps, and Which? runs the most rigorous basket comparison behind a paywall. Each covers a different set of shops.
Do grocery price comparison apps include Aldi and Lidl?
Often not. Lidl is the most frequently missing, and Latest Deals covers neither Aldi nor Lidl. Since the discounters are regularly cheapest on staples, check whether the tool you are using includes them before drawing conclusions.
Do these apps show Clubcard and Nectar prices?
Mostly no. Trolley has no loyalty price toggle and Superizon does not display Tesco Clubcard prices. That is a real limitation, because loyalty pricing now accounts for a large share of supermarket discounting, so a shelf-price comparison can point you to the wrong shop.
Is it worth comparing prices on a whole shop or just expensive items?
Both, but they need different tools. Single-item checks are what Trolley and Superizon are for. Whole-basket totals are a different calculation, since they depend on the quantities each recipe actually needs, and most comparison apps do not attempt it.
Sources
- Compare Supermarket Prices UK (2026 Update: What Still Works?), Household Money Saving (2026-03-28)
- Comparison Apps to Compare Supermarket Prices, Money Saving Central (2025-03-25)
- Groceries product listings and unit prices, Tesco (2026-10-08)
- Groceries product listings and unit prices, Aldi UK (2026-10-08)