Shop smarter with Prijsmattie

1What Prijsmattie does

Prijsmattie is built around one simple idea: for every product you care about, you decide how much you always want in the house. The app compares that with what you actually have, and the difference becomes your shopping list. Then it prices that list at the supermarkets you use.

• Keep track of your stock. Record what's in your cupboards by hand, or take a photo of a shelf and let the app recognise the products Premium.
• Set minimum levels. Tell the app you always want, say, 2 litres of milk and 6 cans of tomatoes.
• Build the list automatically. Anything below its minimum appears on your shopping list. You can also add anything by hand.
• Find the cheapest shop. Each item shows the supermarket where it is cheapest today, and the bottom bar shows your basket total and how much you save.
• Walk the store efficiently. Sort your list in the order of the aisles in your own supermarket.
• Share with your household. Everyone in the household shops from one list, and changes show up on each other's phones.

2Getting started

Create an account

1. Open the app. On the login screen, tap Nog geen account? Maak er een aan (no account yet? create one).
2. Fill in your Naam (name). This is how other members of your household see you in the app.
3. Enter your E-mailadres and a Wachtwoord (password) of at least 6 characters. Tap the eye icon to show or hide what you typed.
4. Tap Account aanmaken (create account). By doing so you agree to the terms (Voorwaarden); the Privacybeleid explains how your data is handled. Both open on prijsmattie.nl.
5. Check your mailbox and tap the confirmation link. The app tells you "Je e-mailadres is bevestigd" and you can sign in.

Sign in

Enter your e-mail address and password and tap Inloggen (sign in). You stay signed in on this phone until you sign out. When the app opens, it greets you with "Welkom terug, [your name]".

Forgot your password

1. On the login screen tap Wachtwoord vergeten?
2. Enter your e-mail address and tap Stuur me een link (send me a link). For privacy, the app always says a link is on its way, whether or not the address has an account.
3. Open the link on the same phone where you requested it. The app opens Kies een nieuw wachtwoord (choose a new password).
4. Type the new password twice and tap Wachtwoord opslaan. If you change your mind, Annuleren leaves your old password working.

The guided tour

The first time you open each main screen, a short tour highlights its most important controls. Tap Volgende (next) to move on, Klaar (done) on the last card, or Overslaan (skip) at any time. To see the tours again, go to Instellingen and tap Rondleiding opnieuw bekijken; each tour then plays the next time you open its screen.

A good first half hour

1. Record what you have. Open Actuele voorraad and add the products in your cupboards, or scan your shelves (section 7).
2. Set your minimums. Open Gewenste voorraad and tap Vul aan vanuit huidige voorraad to copy your current stock as a starting point, then adjust (section 9).
3. Fill your list. Back on the shopping list, tap the magic wand (section 5).
4. Optional: set up the aisle order of your regular supermarket (section 11) and invite your household (section 12).

3Finding your way

The app opens on your Boodschappenlijst (shopping list). Everything else is reached through the menu icon (☰) at the top right, which opens Instellingen (settings). Use your phone's back gesture or the back arrow to return.

Most lists in the app use the same gestures: swipe a row to the left to delete or clear it, and use the − / + buttons to change a quantity.

4How stock and the list connect

Four things work together in Prijsmattie. Understanding them makes the rest of the app obvious.

Productcatalogus

The product catalogue: every product you can put on a list or in stock, with its name, brand, pack size and aisle. It is a large standard catalogue that you can browse and search; you can't create, edit or delete products.

Actuele voorraad

Current stock: how many of each product you have at home right now.

Gewenste voorraad

Desired stock: the minimum you always want at home. Also called voorraadniveaus (stock levels).

Boodschappenlijst

The shopping list: what you still need to buy.

In short: needed = desired − what you have, never less than zero. Your stock counts across all storage places together.

What changes what

5The shopping list

The Boodschappenlijst is the app's home screen. From top to bottom you'll find the add bar with the magic wand, a toolbar for sorting and choosing a supermarket, your items, and a summary bar with your basket total.

Illustration only. Each row shows the product, its brand and pack size, a coloured badge for the cheapest store, and the quantity.

Add a product

1. Tap Voeg product toe… (add product) at the top and start typing.
2. Pick the product from the suggestions. It's added with quantity 1. Products already on your list aren't suggested again.
3. To narrow the suggestions, use the brand chips that appear while you type: Alle (all), A-merk (national brands), or a supermarket's own brand. If your filter hides matches, the app says how many and offers Toon alles (show all).
4. If the product isn't listed, you can't create it yourself: the catalogue is read-only (section 10).

Change the quantity

Use − and + on the row. The quantity can't go below 1 here; to remove the item, swipe it away. Once an item is ticked off, its quantity is locked so your stock stays correct. Undo the tick first if you need to change it.

A small warning triangle next to a product means Onder gewenste voorraad: even with what's on the list, you'll still be below the minimum you set.

Swipe to tick off, undo, or delete

Want ticked-off items out of sight while you shop? Turn on Verberg afgevinkte items in Settings. When everything is ticked off and hidden, the list says "Niets nodig 🎉".

Magisch bijvullen: the magic wand

The wand button next to the add bar tops up your list in one go. For every product with a desired level, it adds whatever is missing: desired minus what you have. If a product is already on the list with a smaller quantity, it's raised.

• Before adding anything, the app asks for confirmation and says how many products it will add. Tap Bijvullen to go ahead or Annuleren to cancel.
• If nothing is missing, you'll see "Alles is al op peil" (everything is at level).
• The wand only writes to your list; it never changes your stock.

Clear the whole list

The red bin icon next to the wand deletes every item on the list after you confirm with Wissen. Your stock is not affected.

Sort: A–Z or by store route

Tap the sort control in the toolbar (it shows the current mode) and choose from Sorteer optie:

• A–Z: alphabetical. Ticked-off items sink to the bottom.
• Winkelroute: grouped by aisle, in the walking order you set up for your default store. A line above the list shows which route is used, for example "Route: Albert Heijn Centrum". Products without an aisle in the route appear under Overige producten. If no route exists yet, the app tells you so; see Store routes.

Which mode the list opens in is set under Standaard sortering in Settings.

The basket bar

At the bottom of the list, Jouw mand (your basket) shows:

• The stores you'll visit with the current choices, and the total for your list.
• How much of the list is priced, such as "14 van 15 producten met prijs". Items without a reliable price are left out of the total, so check this line before trusting the figure.
• Bespaard (saved): the money you've saved on items ticked off so far, compared with buying each at its most expensive store.
• When prices were last updated.
• When you've chosen one supermarket instead of the cheapest mix, how much more that costs, such as "€2,10 duurder dan goedkoopste combinatie".

Tap the arrow on the bar to collapse or expand it.

Shopping together

If you share your list with a household, a people icon appears at the top left of the list. The list refreshes itself about every 15 seconds while it's open, so a product your partner ticks off or adds shows up on your phone too. When that happens, you'll see "De lijst is bijgewerkt". Tap the people icon to open Gezin.

"Niet meer in de catalogus"

Occasionally a product disappears from the standard catalogue, for example when a supermarket renames it. The app then removes it everywhere you had it (list, stock or desired stock) and shows a notice above the list naming those products. Search for the product again; it may be back under a new name. Tap Oké to dismiss the notice.

6Prices and supermarkets

Prijsmattie compares prices across Dutch supermarkets using the open checkjebon price dataset. Which supermarkets appear depends on the prices available, for example Albert Heijn, Jumbo, Plus and others. Every store has its own coloured badge with its initials.

Cheapest mix or one supermarket

The store control in the list's toolbar decides how your list is priced. Tap it to open Supermarkt selectie:

• Goedkoopste (cheapest): every item is priced at whichever store sells it for the least. Your basket may be spread over several shops. This gives the biggest savings.
• A single supermarket: everything is priced at that shop, for when you're doing one trip. Items that shop doesn't sell are greyed out with "Niet beschikbaar bij [store]", or "Heeft een andere maat bij [store]" if it only sells a different size.

House brands are swapped for you

A store's own brand (like AH Basic or Jumbo's own label) is only sold by that chain. When you switch supermarkets, Prijsmattie offers to replace house-brand products with the new store's comparable version. A dialog titled Producten vervangen? tells you exactly how many products will change, and which will stay as they are and why (not sold there, only a different size, or already in your basket). Tap Vervangen (replace) to switch, or Annuleren to stay where you were. If nothing needs replacing, the switch happens straight away.

Compare prices for one item

Tap the store badge on any list item to open Kies winkel (choose store). It lists the price at each store:

• The cheapest store is marked goedkoopst.
• A small line chart shows the price over the last 30 days, with an arrow: ↑ went up, ↓ went down, → stayed the same.
• Prices marked geen match mean that store has no matching product.
• When the cheapest-mix mode is on, tap a store to buy this item there instead. Tap it again to go back to the cheapest. This choice lasts until you close the app.

For a house-brand product, the list shows a section Vergelijkbaar bij andere supermarkten (comparable at other supermarkets). These prices belong to a similar product, not the same one. Tap one to replace the item on your list with that store's version.

A grey ? badge means no store you compare has a price for this product. Tap it to see why: the product may only be priced at supermarkets you switched off.

Choose which supermarkets count

Instellingen → Supermarkten vergelijken

Switch off any supermarket you never visit. Switched-off stores are ignored in every price comparison, in the brand filter and in the store selector. If you've switched off every store that sells a product, the price panel names them, for example "Alleen bij Jumbo, die staat uit in Supermarkten vergelijken."

Messages above the list

• "Prijzen laden…": prices are still being fetched. Your items are already usable.
• "Geen prijzen van: …": no current prices from the stores named.
• "Geen actuele prijzen van [store]": the store you picked has no current prices.
• "Prijsvergelijking is tijdelijk niet beschikbaar": comparison is temporarily down. Your list still works.

7Managing your stock

Instellingen → Voorraad beheer

Voorraad beheer (stock management) offers two cards:

• Actuele voorraad: wat je nu in huis hebt, what you have at home now.
• Gewenste voorraad: minimale niveaus per product, your minimum per product (section 9).

Actuele voorraad: current stock

This screen lists every product you have at home, with a count and a total number of items at the top.

• Add a product: type in Zoek producten, then tap a result under Toevoegen aan voorraad. If it isn't in the catalogue, you can't create it yourself.
• Change a count: use − and +. Your shopping list updates straight away.
• Remove a product from stock: swipe it left and tap Wissen. Its count becomes 0.
• Clear all stock: tap the bin icon and confirm with Wissen. Everything goes to zero, and everything with a desired level reappears on your list.
• Scan a shelf: tap the camera button Voorraad scannen Premium. See the next section.

8Scanning a shelf Premium

Instead of typing everything in, take one photo of a cupboard or shelf. Prijsmattie recognises the products and their counts, and matches them to your catalogue.

Take the photo

1. On Actuele voorraad, tap the scan button.
2. Choose Foto maken (take photo) or Kies uit galerij (choose from gallery).
3. Wait while the app shows "Analyseren…".

Review what was found

The Gevonden producten (products found) screen shows your photo at the top ("Vergelijk met de scan": compare with the scan) and a row for each product found.

• Correct the count with − and +.
• Matched products say "Gekoppeld aan [product]". If the match is wrong, tap Niet juist? (not right?) and choose from the alternatives.
• Unsure matches ask Welk product is dit? (which product is this?). Pick one of the suggestions. If there is none ("Niet gevonden in de catalogus", not found in the catalogue), you can only remove that line: you can't create a product yourself.
• Remove a row that isn't a real product with Verwijder.
• Tap Toevoegen on each row to add it to your stock. It then shows Toegevoegd. A line at the bottom counts how many rows still need a choice, like "Kies nog 2 producten".
• Tap Klaar (done) to go back to your stock. If some rows weren't added, the button says so, for example "Klaar — 2 niet toegevoegd". Everything you already added is saved.
• Not happy with the photo? Foto opnieuw takes it again.

Scans are limited to a few per minute. If you see "Te veel scans", wait a minute and try again.

9Desired stock levels

Instellingen → Voorraad beheer → Gewenste voorraad

Here you set the minimum you always want at home for each product. Whenever you drop below it, the product appears on your shopping list.

• Add a product: search with Zoek producten and tap the product to give it a desired level. If it isn't in the catalogue, you can't create it yourself.
• Change the level with − and + on the product's row under Op je lijst.
• Remove a level: swipe the row left and tap Wis.
• Start from what you have: Vul aan vanuit huidige voorraad copies your current stock as desired levels in one go. Fine-tune individual products afterwards.
• Remove all levels: Voorraadniveaus wissen, confirmed with Wissen. Your current stock and shopping list stay as they are.

10The product catalogue

Instellingen → Productcatalogus

The catalogue holds every product you can use in the app, grouped by aisle. The top line tells you how many there are: over 8,000 products, spread over about twenty aisles. The catalogue is read-only: you can look products up and browse them, but you can't create, edit or delete them yourself.

Browse and search

• Tap an aisle to open or close it, or use Alles uitklappen / Alles inklappen to expand or collapse them all.
• Big aisles load in pages. Toon meer (…resterend) loads more and shows how many are left; with a large number, searching is quicker.
• Type in Zoek in catalogus… to search, and use the brand chips (Alle, A-merk, or a store's own brand) to narrow the results.

See a product's prices

Tap the € icon on a product to open Prijzen per winkel (prices per store), with the same store list, cheapest marker and 30-day trend as on the shopping list. For house-brand products, tap a comparable product at another store to add it to your shopping list.

11Store routes

Instellingen → Winkelroutes

A store route is the order in which you walk past the aisles of a particular supermarket. With a route set, the list's Winkelroute sort puts your items in that order, so you don't have to walk back and forth.

Set up a route

1. Type a store name in Naam winkel, for example Albert Heijn Stationsplein, and add it. Your stores appear as chips at the top.
2. With the store selected, add aisles. Type a name under Afdeling, or open Beschikbare afdelingen to pick from the aisles in your catalogue. Using the catalogue's aisle names makes sure your products land in the right group.
3. Put the aisles in walking order with the up and down arrows (Omhoog / Omlaag).
4. Press and hold a store chip to make it your Standaardwinkel (default store). It gets a star, and the shopping list uses its route.

• Remove an aisle by swiping it left and tapping Verwijderen.
• Remove a whole store with Verwijder winkel; this deletes all its aisles.

12Sharing with your household

Instellingen → Gezin delen

Household members share one shopping list, one stock and one catalogue. Everyone sees the same thing, and ticks and additions show up on each other's phones.

Invite someone Premium

1. Under Nodig iemand uit, create an Uitnodigingscode (invitation code).
2. Tap Code kopiëren and send it to the person you want to invite. The code works once and expires after 7 days.

Only the household's owner (beheerder) can invite people. A household can have up to 12 members. Without Premium, the screen says sharing is a Premium feature; Bekijk Premium opens the Premium screen (chapter 14).

Join a household

Joining is free. Enter the code you received under Deelnemen aan een gezin and tap Deelnemen. Your own list, stock and catalogue are kept safe and come back as soon as you leave.

Members, removing and leaving

• The Leden list shows everyone, with (jij) for you and beheerder for the owner.
• The owner can remove a member with Verwijderen.
• A member can leave with Gezin verlaten and returns to their own list, stock and catalogue exactly as they left them.

13Settings

Open Instellingen with ☰ on the shopping list.

Beheer (manage)

Links to Productcatalogus, Voorraad beheer, Winkelroutes, Supermarkten vergelijken and Gezin delen, plus Rondleiding opnieuw bekijken to replay the tours.

Weergave (display)

Abonnement (subscription)

Shows whether you're on the free version (Gratis) or Prijsmattie Premium, and what is happening with your subscription. This is also where you take Premium, restore an earlier purchase or manage your subscription. See chapter 14.

Over (about)

Shows the app Versie with its level after it, for example "1.5.2 (niveau 1)", and the Build. Quote all three when reporting a problem. Also here: Licenties (open-source credits and the price data source), the Privacybeleid, Voorwaarden and Contact pages, and Feedback sturen.

Sending feedback

Describe what went wrong and what you expected in the text box, then tap Versturen. The more specific, the better. Your version and build are included automatically.

Account

• Ingelogd als shows the e-mail address you're signed in with.
• Naam changes the name your household sees. Tap Opslaan to save.
• Mijn gegevens exporteren (export my data) makes a file with your lists, stock, history and account details. Your phone opens its share menu so you can save or send it. You can export a few times an hour; if you see "Probeer het over een uur opnieuw", wait a while.
• Uitloggen signs you out and clears your data from this phone. Your data stays safe in your account.
• Account verwijderen permanently deletes your account. See below.

Deleting your account

If you pay for Premium yourself, the screen says so. Deleting your account does not cancel the subscription: it keeps running until you cancel it in Google Play or the App Store. Premium itself stops at once, and if others share your household, they lose Premium too. So cancel your subscription first (chapter 14).

To confirm, enter your password and tap Verwijder mijn account.

14Free and Premium

Prijsmattie comes in a free version and Prijsmattie Premium, a monthly subscription through Google Play or the App Store. Your current plan is shown under Instellingen → Abonnement.

On the free plan, adding a sixth product opens the Premium screen ("Je gratis lijst zit vol: maximaal 5 producten."). If you close it, the list says "Gratis versie: max. 5 producten. Upgrade naar Premium voor een onbeperkte lijst." A household shares the subscription: when one person pays, everyone in the household has Premium.

Taking Premium

1. Go to Instellingen → Abonnement and tap Upgraden naar Premium. The Premium screen also opens by itself when you try a Premium feature: a sixth product on your list, the scan button, or inviting someone to your household.
2. The screen shows what you get, the monthly price and any free trial. Price and trial come straight from Google Play or the App Store.
3. Tap the button at the bottom: Start Premium, or "Probeer [periode] gratis" (try free) when there is a trial, and complete the payment in the store. The subscription renews every month until you cancel.
4. Done? You'll see "Welkom bij Premium", and everything is unlocked, for your household too.

Premium belongs to your Prijsmattie account: sign in on another phone with the same account and you have it there too. If you're paying but the app still says Gratis, tap Aankopen herstellen (restore purchases). The app then asks the store for your subscription. If it finds none, you'll see "We vonden geen actief abonnement bij je …-account."

Your subscription

Instellingen → Abonnement shows what is happening with your Premium:

• Cancelling or changing your payment method: tap Abonnement beheren (manage subscription). It opens the subscriptions page of Google Play or the App Store. You can only cancel there.
• If you bought Premium on your other kind of phone (an iPhone, say, while you now use Android), the app tells you where to manage it.
• If your household already has Premium through someone else, the app tells you that you can cancel your own subscription.

15Messages and troubleshooting

16Dutch–English glossary

Aankopen herstellen

Restore purchases: ask the store for a Premium subscription you already have

Abonnement / Abonnement beheren

Subscription / manage subscription (cancel or change payment, in the store)

Afdeling / schap

Aisle / shelf section

A-merk

National (name) brand, as opposed to a store's own brand

Afvinken / afgevinkt

Tick off / ticked off

Beheerder

Owner of the household

Bespaard / bespaar

Saved / save

Boodschappenlijst

Shopping list

Gekocht

Bought

Gewenste voorraad

Desired stock (your minimum levels)

Gezin

Household

Goedkoopst(e)

Cheapest

Huismerk

House brand, a supermarket's own brand

Instellingen

Settings

Magisch bijvullen

Magic top-up: fill the list from your desired stock

Mand

Basket

Ongedaan

Undo

Opslaan / Annuleren

Save / Cancel

Productcatalogus

Product catalogue

Proefperiode

Free trial, when the store offers one; the paid subscription starts after it unless you cancel

Rondleiding

Guided tour

Standaardwinkel

Default store

Toevoegen / Verwijderen / Wissen

Add / Delete / Clear

Verpakking

Pack size

Voorraad / Actuele voorraad

Stock / current stock

Winkelroute

Store route: aisle walking order