Mercadona, Lidl Plus, Carrefour and DIA compared — warehouse home delivery, one-tap repeat shops and coupon programmes that stack real savings.
Ordering the weekly shop from the phone removes the two worst parts of supermarket life — the bags and the queue — but the catalogue is not what separates the chains. Logistics is: whether your order is picked from a supermarket aisle or a dedicated warehouse, how delivery slots are released, and whether the app is a shop at all or a coupon wallet you scan at a physical till. The two apps reviewed in depth below cover the largest online grocer and the most rewarding in-store loyalty programme, while the questions compare Carrefour and DIA so the four biggest options are covered for 2026.
Mercadona is the one genuinely convenient way to shop Spain's biggest chain online, delivering from warehouses and rebuilding your usual order in a tap.
Unlike grocers that pick orders from store shelves, it delivers from dedicated warehouses, which shows up directly in availability: far fewer out-of-stock substitutions on the weekly shop, and the same prices as the physical store. The cart persists between sessions, and a regular-shopping list reconstructs a typical order in one tap, which makes repeat buying almost effortless. The weak point is exactly what depresses its app rating: delivery slots run out quickly, coverage does not extend to every province, and most negative reviews trace back to delivery problems rather than the software itself.
Lidl Plus is not an online shop but a free coupon programme you scan at the till, with personalised offers that add up over a year.
You scan the app's code at checkout and collect coupons, scratch cards and offers personalised around what you actually buy, with digital receipts and purchase history kept automatically. It costs nothing, and for anyone who already shops at Lidl the accumulated savings over a year are considerable — the clearest money-back case among the four apps, even though no delivery exists. The trade-offs are inherent to loyalty schemes: registration requires personal data, expect frequent promotional notifications, and anyone wanting groceries brought to the door must look to Mercadona, Carrefour or DIA.
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Questions & answers
Which is the best online supermarket app in Spain?
Mercadona for the full weekly shop, because warehouse delivery sharply reduces missing items, a common flaw with in-store picking. Carrefour fits better when non-food products matter, and DIA when price is the main criterion. Outside Spain, only Lidl Plus has a direct equivalent in most countries; the other three are Spanish-market apps.
How much does home delivery cost?
It varies by chain and basket size. Mercadona, Carrefour and DIA charge a delivery fee that usually drops or disappears above an order threshold, which nudges people toward bigger shops. Carrefour and DIA also offer click and collect, normally free and the cheapest route if passing the store works for you. Lidl Plus has no delivery at all.
Are online prices the same as in the shop?
At Mercadona, yes, they are identical. Other chains occasionally differ online versus a specific store because some promotions are local. Carrefour and DIA coupons work in both channels, but you must activate them in the app before paying.
Is a supermarket app worth it if I always shop in store?
Yes, mainly for discounts. Lidl Plus, Carrefour's El Club and Club DIA all offer free personalised coupons based on what you usually buy. The price is data about your shopping habits, which is precisely what the chain receives in return; whether that trade suits you is a personal decision.
More related apps
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