Where Eini's prices come from

In short: Eini works with specific products from eight Swiss retailers, each with a name, pack size, store and price. Promotions come in week by week, as soon as each store publishes them. This page shows where every number comes from, when it was updated and what is an estimate.

Real prices. Real products. Savings you can check.

This week's numbers

As of November 15, 2026

Calculated automatically from the Eini database. Totals only, no personal data.

Every chain's current deals, sorted by category and discount: Deals this week.

Week by week

Every Sunday evening, Eini stores a snapshot of these numbers for each store. The series starts with the week from September 28, 2026.

Weekly snapshots, calculated automatically from the Eini database. Totals only, no personal data.

Download all weeks as a CSV file

Licence: CC BY 4.0. You may reuse these numbers if you cite the source, for example: “Eini (eini.app), weekly grocery data, week from 28 September 2026”.

Median discount: for each food promotion, the regular price minus the promotion price, divided by the regular price. At Coop the regular price is often missing; then Eini uses the discount Coop states. We publish the median of a store only when it has at least 30 food promotions and at least half of them have a usable discount.

Where the prices come from

• Promotion prices come from each store's public promotions pages.
• Regular prices come from each store's online range.
• Eini is not affiliated with any store.

How a recipe reaches your list

1. You choose the number of people, the days you cook and the stores. Eini picks the recipes from a library of 844.
2. Each ingredient is linked to a specific product, with name and pack size, in the chosen store.
3. If that product is on promotion this week, the promotion price counts. If not, the regular price does.
4. The list shows product, quantity, store and price.

In October 2026, 100.0% of the items on shopping lists had a product, a store and a price. 10.4% were on promotion.

How we calculate the saving

We compare with the same shopping without promotions. In October 2026, the median saving was 7.0% across 280 meal plans, test accounts excluded. It is a planned saving: what you actually save depends on what you buy in the store.

Limits we know about

• Prices are not real-time. Promotions come in once a week per store.
• Regular prices are a dated snapshot of the online range.
• Regional offers do not apply in every branch.
• Otto's only has promotion prices so far.
• Coop and Otto's's promotions do not have a validity date in Eini yet, so we show the collection date.