Make a shopping list
Type what you need or load your saved base list. The fastest way to start.
Grocery price comparison for Finland.
Save on every shopping trip.
Compare store prices automatically. Make a shopping list and get the cheapest combination in a second. Finnish families save an estimated €780 a year.
No sign-up required. Works right away.
S-market
Prisma
Sale
Alepa
K-Market
K-Supermarket
K-Citymarket
Lidl
Kauppavainu
31.07.2026
Add an item to your list...
Arla Kevytmaito 1 l
1,49 €
Juhla Mokka 500 g
4,95 €
Jauheliha 17 % 400 g
2,99 €
Fazer Ruispalat 330 g
1,89 €
Banaani 1 kg
1,19 €
Valio Oivariini 400 g
3,79 €
Kananmunat 10 kpl
2,49 €
Pirkka Pasta 500 g
0,89 €
Lidl
5 items
12,51 €
K-Market
3 items
7,17 €
Total19,68 €
You save
vs. buying everything in one store
8,40 €
How it works
Three steps. Real savings.
Calculate your savings
The app compares prices at your nearby stores and calculates the cheapest combination. In under a second.
Go shopping
A clear plan: what to pick up from Prisma, K-Citymarket or Lidl. Covers all S Group and K Group stores.
Savings
Small price differences add up fast.
One shopping trip, €15 saved. Once a week, that is nearly €800 a year. Kauppavainu does the comparison for you.
€15
Typical saving per shopping trip
€780
Estimated saving per year
2
Stores at most per trip
<1 s
To calculate the cheapest combination
Features
Designed for saving money.
Cheapest combination, calculated
The app tells you whether to buy everything in one store or split between two. A clear answer — no pointless detours.
Pro
Reports
See where your food money goes
Weekly, monthly and yearly reports show where your money goes. Clear pie charts reveal where you save and where you don't.
Pro
Price alerts
Price drops — you get notified
Mark a product to watch. You get a notification when its price drops at a store near you.
Pro
Sharing
One list for the whole family
The shared shopping list updates in real time. Add a product at home — your partner sees it instantly at the store.
Search a product — compare instantly
Type a product name and see prices at all your nearby stores in a second. Add it straight to your list.
Save your own nearby stores
Set the stores you actually visit. The app remembers them and always compares using your stores' prices.
Pro
Domestic
Save money. Support Finnish producers.
Choose the domestic option whenever the price difference is reasonable. You see exactly what buying Finnish costs.
Filter for allergies and diets
Gluten-free, lactose-free, vegan, dairy-free — set your own filters and see only the products that suit you.
Pricing
Pays for itself on the first trip.
Free
€0
forever
- Shopping list
- Product search by store
- Cheapest combination, calculated
- Your own nearby stores
- Nearby store search
- Diet filters
- Includes ads
- Deals view
- Reports
- Price alerts
- Family sharing
- Domestic filter
Pro — yearly
€19.99
per year · save €15.89 vs. paying monthly
- Everything in Free
- Ad-free
- Deals view
- Weekly, monthly and yearly reports
- Price alerts and notifications
- Family sharing
- Domestic filter
- Unlimited purchase history
Monthly plan also available — €2.99/month
Privacy
Your data. Under your control.
Your shopping habits are your business. Kauppavainu is built so the data stays with you — not with us.
No mandatory sign-up
Download and start right away. An account is only needed if you want to sync across devices.
Your list stays on your device
Shopping lists are stored on your phone, not on a server. We don't see what you buy.
GDPR compliant
Servers in the EU. Zero tracking pixels. You can download or delete all your data at any time.
No purchase tracking
We never know what you actually buy. Scanned prices are shared with the community fully anonymised.
Stores
Every chain. One app.
The comparison covers S Group, K Group and Lidl — over 900 stores across Finland.
Prisma, S-market, Sale and Alepa — S Group
K-Citymarket, K-Supermarket and K-Market — K Group
Lidl
- Cheapest combination calculated for free
- All prices visible — no paywall
- Works without registration
- In Finnish, Swedish and English
- Diet filters — gluten-free, vegan and more
FAQ
Frequently asked questions.
What is Kauppavainu?
Kauppavainu is a Finnish mobile app that compares grocery prices and calculates the cheapest combination for your shopping list. It covers S Group stores (S-market, Prisma, Sale, Alepa), K Group stores (K-Market, K-Supermarket, K-Citymarket) and Lidl.
How much can you save with Kauppavainu?
The typical saving is an estimated €15 per shopping trip. Over a year that means roughly €780 for a Finnish family. The app compares prices at your nearby stores and suggests at most two stores per trip, so the saving is significant without extra hassle.
How does Kauppavainu work?
You make a shopping list in the app. Kauppavainu compares product prices across your nearby stores and calculates the cheapest combination in under a second. The app clearly shows what to buy where and how much you save compared to buying everything in a single store.
Is Kauppavainu free?
Yes. The basic version of Kauppavainu is free and includes the shopping list, price comparison and the cheapest-combination calculation. The Pro version costs €19.99 a year and adds reports, price alerts, family sharing and the domestic filter.
Which stores does Kauppavainu work with?
Kauppavainu works with all the largest Finnish grocery chains: S-market, Prisma, Sale, Alepa, K-Market, K-Supermarket, K-Citymarket and Lidl.
Coming soon. Be among the first.
Leave your email and we'll let you know the moment the app is available.
No spam. Just one message when the app launches.