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

The set arrived two days after the order and was properly packed, nothing had slipped, nothing was crushed. The instructions are included in English and are actually written to be readable — with pictures in the places where text alone does not get you there. What I missed was a note on how often the pads should be changed; I had to ask, and the answer came the same day. After three weeks in use everything holds up as it should: the straps have not stretched, the fastening does not jam, and after washing the material no longer smells of new goods. It sits at the upper end price-wise, but in return you get something that does not need replacing after two months. One heart off for the missing detail in the instructions.

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Product reviewed: Comfort Aftercare Set

And this is what your visitors' browser checks

Simulation

Conventional 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. 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. 2

    Enclose it

    Stick it on the packaging, put it in the parcel or print it on the invoice.

  3. 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.