MasterMarket vs Cisean: how the two Irish grocery comparison apps differ

Both apps want to help Irish shoppers spend less on the same five supermarkets, but they pursue that goal differently. As checked in May 2026, Cisean is built around an open-data, community-contributed catalogue — its in-app games invite users to scan barcodes and match products, and its database lives on GitHub. It's a strong fit for shoppers who enjoy contributing and want loyalty cards in one place.

MasterMarket is built around the act of saving money on a specific basket: prices scraped twice a week, alerts when the items you actually buy drop in price, and an AI assistant — Foxy — that compares your basket across the 5 stores in seconds. The two apps make different bets about how Irish people shop.

Most shoppers don't open a comparison app every day. They notice a price after paying, or miss a promotion entirely because they didn't check. Price-drop alerts flip that pattern — the app tells you when the trolley you'd build this week is suddenly cheaper at Aldi, or when your usual yoghurt drops at Tesco.

MasterMarket Premium goes a step further with price-drop predictions: based on the price history we've scraped, the app flags items likely to fall this week so you can wait, or items at a structural low so you can stock up. This is the single biggest behavioural difference between the two apps — Cisean's product surfaces (as checked in May 2026) didn't list price alerts, which means the user has to remember to check.

Foxy is MasterMarket's built-in AI assistant. It's conversational, not a search box. You can ask things like:

• “Rebuild my last basket at the cheapest store this week.”
• “Where is Kerrygold butter cheapest right now?”
• “Is a Tesco Clubcard worth it on this shopping list?”

The free tier gives you 10 questions an hour. Premium raises that to 50/hour and unlocks the AI Basket Optimizer, which rebuilds a saved basket across the five stores and shows you the cheapest split. As checked in May 2026, Cisean did not list an AI assistant on its product surfaces.

Data freshness is the quiet thing that makes or breaks a comparison app. MasterMarket scrapes the five retailer websites automatically twice a week (Monday and Thursday) and scans promotions weekly. Users can also submit prices for items the scrapers miss or mis-parse.

As checked in May 2026, Cisean's data model leaned on user contributions through its gamified scanning experiences — Barcode Hunter and Match Maker — and an open-source barcode database on GitHub. It's a transparent, community-first approach with real merit, and we mention it neutrally. We can't verify per-product freshness for other apps.

Neither app is universally “better.” They're tuned to slightly different shopping behaviours.

Choose MasterMarket if you want price-drop alerts on the items you actually buy, an AI basket optimiser that compares the five stores for you, prices scraped from store websites twice a week, and a clear premium path (€2.99/month) when free isn't enough.

Choose Cisean if you want a free-only app, you'd like to store all your loyalty cards in one place, you want weekly in-app leaflets, or you specifically want to support an open-data community project.

Plenty of Irish shoppers will be well-served by using both — Cisean for the loyalty wallet and leaflets, MasterMarket for scraped prices, alerts and AI. There's no exclusivity.