Product reviews
Not the business. The product.
A single-use code that travels on the packaging, the delivery note or the invoice. What gets reviewed is what it says on the label — with a row of hearts instead of four dimensions.
See what ends up on your profile
This is how a product review appears on your profile: a row of hearts for the item reviewed, not four dimensions.
4 out of 5 · Review on 12 September 2026
Product reviewed: Comfort Aftercare Set
And this is what your visitors' browser checks
SimulationConventional signature (Ed25519)
Mathematically confirmed
Post-quantum signature (Falcon-1024)
Mathematically confirmed
Anchored in the Bitcoin blockchain
Review since block #965,597
Content unchanged since the review was given
Text, rating and product details match the signature
There is deliberately no location check here: a product is unpacked at home. The trust anchor is the signature of the single-use code itself — and that is exactly what the real verification dialog shows.
What sets the product QR code apart
One code, one item, one review.
It carries its item in its name
You give each code a label. It later appears above the review — so the reader knows what it was about.
One row of hearts
Friendliness or cleanliness do not fit a product. So there is one score here instead of four, and it feeds into your overall average on equal terms.
Usable once
After the review the code is spent. Photographing it and passing it on gains nobody anything.
Three steps to your code
- 1
Generate codes
Individually with a label, or as a batch with sequential numbering. In the dialog you generate up to 500 codes per run, and from Premium additionally via the REST API.
- 2
Enclose it
Stick it on the packaging, put it in the parcel or print it on the invoice.
- 3
The customer scans
A row of hearts, a sentence to go with it, done. No account, no app.
What you should know about it
Product QR codes count against your 30-day quota: 50 from Classic, 1000 from Pro, 5000 from Premium. The dialog and the REST API share the same budget — there is no separate API quota.
There is deliberately no location check here: a product is unpacked at home, not in the shop. The trust anchor is the signature of the code itself instead.
Let people review what you sell.
Generate codes, enclose them, collect the responses.