Slow Change
What groceries really cost.
A pack of coffee that went from 500 to 450 grams while the price stayed put. Milk that got ten percent dearer in six months. Nobody sees it, because nobody remembers what a pack cost or weighed last year. Slow Change remembers it for you.
Free for your first three receipts, in full. Then Slow Change Pro.
How it works
Photograph your receipt
The app reads it on your phone, without a server. The photo is not kept; only the lines read from it.
Check what it read
Every line can be corrected. A line that is not a product goes with one tap.
See the unit price
From your second receipt on: each product's price per kilo, per litre or per piece, and the arrow since your first purchase.
Same pack, same price, 50 grams less.
Slow Change sees the difference between 500 and 450 grams, even when you did not. Each product carries its whole series: date, shop, size, price, unit price.
What it is not
Not a price comparison. Slow Change never sends you to another shop and earns nothing from where you buy. It keeps only your own history. That is what keeps it honest.
What's next
Slow Change is about one pattern: things that change so slowly you never see them. Groceries come first. These are the next three. They are not in the app yet. Click what you want; the most chosen one gets built first.
Daylight
How much daylight do you actually get? The app measures the light around you when you open it and keeps the series. It measures a room, not a person.
Wear
Your washing machine compared with itself. Phone on the machine during the spin; today's vibration next to last month's.
Dose
How much sound your ears get per day, from what your iPhone and Watch already track. A daily budget, no microphone.
Cracks and damp in your home that grow slowly? That is Bouwoog (Dutch), with a file that keeps every photo dated.
Price
In full, not a stripped version. Basket, series and shrinkflation work right away.
Slow Change Pro: unlimited receipts. Cancel in your App Store settings.
With three days free. Your history stays readable, with or without a subscription.
Everything stays on your phone
No account, no server, no sync, no analytics. Delete the app and your history is gone. See the privacy policy.