2026 · iOS · Android · Web
Bier-Radar
The cheapest beer deal around the corner
Every Dutch supermarket runs beer promotions, spread over eleven different weekly flyers. Bier-Radar collects them all and shows the deals within your radius, sorted by discount or by price per litre.
Filter on crate, bottle or can, on your favourite brands, and on the chains you actually visit. Every deal shows the store and how far away it is.
- Role
- Solo product
- Chains
- AH, Jumbo, Plus, Lidl, Aldi, Dirk and five more
- Data
- Refreshed weekly by an AI pipeline
Deals, not flyers
The app opens on a ranked list of deals near you. Tap one for the store, the price per litre and how long the offer runs.
The hard part is the data
Supermarkets don't publish their promotions as data. A scraper screenshots each chain's offers with Playwright, OpenCV slices the page into separate offer cards, and GPT-4o extracts brand, packaging, volume and price as structured JSON.
An orchestrator verifies every run before it is imported into a Spring Boot and PostGIS backend on Railway. Distance queries run in the database, so the app only receives deals that are actually within reach.