Guide · Shopping planning

Shopping list from receipts: build one from what you actually buy

Updated 5 October 2026 · 6 min read

To make a shopping list from your receipts, look at what keeps showing up on your last few grocery receipts (Kassenbons in German) and put those items on the list. You can do that with a pen and a tally sheet, or ask the Bonstructer chat to build it from your scanned receipts. The chat's answers are written by an AI based on your receipts and can be wrong, so skim the list before you go.

Why do hand-written shopping lists often fail?

Most lists get written in the kitchen or in the car park, from memory. That is where the usual mistakes come from: the oat milk you buy every week is missing, while you bought mustard for the third time. Memory holds on to unusual purchases, not habits.

A receipt, on the other hand, is a complete and honest record. It lists every item with quantity and price, and you did not have to write anything down. That makes it a good starting point for the next list.

How do you build a shopping list from receipts by hand?

You do not need an app for this. Collect the receipts from the last four to six weeks.

1. Gather your receipts. Lay out the receipts from your regular supermarket, such as REWE, Edeka, Lidl or Aldi. Thermal paper fades over time, so photograph important ones early (see our guide on what to do with a faded receipt).
2. Keep a tally. Write each item down once and add a stroke for every further receipt it appears on. Merge items that are named differently, such as "organic yoghurt" and "plain yoghurt".
3. Mark your staples. Whatever appears on almost every receipt becomes a fixed item on the list. Things that showed up only once are usually one-off purchases and stay off.
4. Set quantities and rhythm. If you buy two litres of oat milk per trip, write "2 × oat milk". Washing powder you buy only every six weeks goes on the list only when it is due.
5. Check your stock. A quick look in the fridge and cupboard crosses off what is still there. The receipts tell you what you usually need, not what is already at home.

This works well but takes time. Four receipts with 20 lines each already mean 80 lines to compare by hand, and it gets tedious with several shops or a household of two.

How does Bonstructer build the list from your receipts?

After a scan, every line item sits in your notebook with quantity, price and category. The shopping planner builds on that: the chat creates the list from what you buy regularly, so you do not have to keep a tally yourself.

1. Scan your receipts. Use the camera, a photo, a PDF, a QR e-receipt or pasted text. Long receipts can be photographed in several parts and are stitched together automatically. If a line is read wrongly, you correct it right in the receipt.
2. Ask in the chat. For example: "Make me a shopping list for my supermarket with what I buy there every two weeks."
3. Review the list. You get items with quantities, for instance oat milk 1 l × 2, organic yoghurt 500 g, bananas 1 kg, wholemeal bread. The chat also names roughly what you last spent there. That is a reference point from your earlier receipts, not a price guarantee.
4. Take it with you. If you like, push the list to Bring!, a shared shopping list app, or copy it and paste it into a notes app or a message.

Manual list or chat: which is better?

• By hand: full control and no account needed, but it takes time and counting mistakes creep in.
• Chat: fast and uses all your scanned receipts, but only works if you have captured your receipts.
• Either way: checking what you already have at home stays your job.
• Bring! export or copy: the list ends up where you look anyway in the shop.

How accurate is the list, and what can it not do?

The more receipts in your notebook, the better the list reflects how you really shop. After a single scanned receipt, the chat knows no habits yet. Purchases without a receipt, such as the farmers' market or a bakery that gave you none, are missing from the picture.

The shopping list is meant for grocery shopping, as are the price check and the recipe idea. Other receipts, from a DIY store or a garage, can still be stored in your archive, but they do not feed the list.

Less food waste is a nice side effect of a good list, not a promise, and we deliberately name no savings amounts here. For background on the topic, see the German federal food ministry's initiative "Zu gut für die Tonne!" (Too good for the bin).

Can I share the notebook with a partner or flatmates?

Yes. You can share the notebook with a partner, family or a flat share: everyone scans, everyone sees the same receipts. The list is then built from the shared set of receipts.

What does it cost, and where does it run?

Bonstructer runs in the browser at bonstructer.com/app. Basic use is free; some extra and AI features use credits (AIC), and the price is shown before you confirm. The Android app is in closed testing on Google Play; on an iPhone you add the web app to your home screen. Real examples of how well tricky receipts are read are on the home page. For better photos, see our guide on scanning receipts.