What the product page charged, day by day, behind the 'was' price
RivalSweeper records the price on a product page every day, with date, URL, market and currency, and sets each 'was', 'compare at' or '% off' claim against what the page actually charged. The evidence pack is scoped to the products and period in your matter.
Opens rivalsweeper.com, the service behind this page.
- Daily price per product page, with date, URL, market and currency
- The stated discount recomputed from recorded prices, not copied from the banner
- Days without an observation listed as gaps, never estimated
| Field | What it shows |
|---|---|
| Product and source | Product, store, page URL, market and currency |
| Daily price record | The price on each recorded day, with its date |
| The claim | The 'was/now', 'compare at' or '% off' claim, as displayed |
| 30-day lowest prior price | Lowest recorded price in the 30 days before the reduction, and its date |
Structure of the evidence pack. No sample data shown.
California Bus. & Prof. Code §17501 ties an advertised former price to the prevailing market price in the 3 months before the ad, unless the ad states when that price applied.
Source: leginfo.legislature.ca.govHinojos v. Kohl's Corp. (9th Cir., 21 May 2013): a shopper who buys because of a false former price, and would not have bought otherwise, has standing under California's false advertising and unfair competition laws.
Source: cdn.ca9.uscourts.govA reference-price case turns on a price history nobody kept
Was the 'was' price ever the price the product was actually offered at, for long enough and recently enough to count? The answer is a daily price history for specific products across the class period, and before discovery the retailer usually holds the only copy. Counsel start with a few screenshots and an archived page.
The tests are about time. The FTC's guides ask whether the former price was openly and actively offered for a reasonably substantial period; California's §17501 looks to the prevailing price in the three months before the ad. A screenshot proves one day. It does not show how long a 'compare at' price stood or whether the sale ever ended. Defense counsel answering a demand letter face the same gap from the other side.
Without it
- Manual screenshots and the Wayback Machine: Free and familiar. A screenshot proves one day; archive captures are irregular and may miss your products and dates.
- Waiting for discovery: The retailer's data is the fullest source, but it arrives after filing, on the other side's timetable.
- Enterprise price-intelligence suites: Built for retailers' pricing teams on ongoing subscriptions; not scoped to a per-product record for one matter.
With Discount Evidence Record
- Daily price per product page, with date, URL, market and currency
- The stated discount recomputed from recorded prices, not copied from the banner
- Days without an observation listed as gaps, never estimated
- Daily price record
- Reference price vs prices charged
From a free call to an evidence pack
- 1
Free, confidential first call
Name the retailer, products and period. We check whether those pages are already recorded and from what date.
- 2
Scope and quote
Products, markets, date range and the claims to test are agreed. One clear quote before any work.
- 3
Record pulled, claims recomputed
Daily prices per product, each claim set against them, the discount recomputed, and how long and how recently the reference price was charged.
- 4
Evidence pack delivered
One record per product with a method note listing every gap. Counsel and experts decide how to use it.
Features
Daily price record
Full price, current price and stock status per product page, captured daily with date, URL, market and currency.
Reference price vs prices charged
Each 'was' or strikethrough price set against what the page charged, so you see whether it was ever the selling price.
Former-price duration and recency
How long the reference price was charged on recorded days, and when it was last charged before the ad.
Recomputed discount
The stated '% off' recalculated from recorded prices and shown next to the claim.
Strict comparison rules
A change counts only when source, market and currency match; a jump of more than 5x is not treated as a price move.
Gaps disclosed
Days with no observation are listed in the method note. Nothing is interpolated.
What each product record contains
Packs are confidential to the matter, so no sample is published. Every product record follows this structure.
| Field | What it shows |
|---|---|
| Product and source | Product, store, page URL, market and currency |
| Daily price record | The price on each recorded day, with its date |
| The claim | The 'was/now', 'compare at' or '% off' claim, as displayed |
| 30-day lowest prior price | Lowest recorded price in the 30 days before the reduction, and its date |
| Recomputed discount | The discount recalculated from recorded prices |
| Method and gaps | How figures were produced; days without an observation listed |
- History starts when tracking starts; nothing is shown for days before a store was added.
Structure of the evidence pack. No sample data shown. · See the full sample on rivalsweeper.com →
Who it's for
Plaintiff-side class-action attorneys
Vet a pre-filing investigation: did the reference price hold up across the class period, before discovery reaches the retailer's records?
Paralegals and pricing experts
One structured record per product instead of a screenshot folder. Note its scope: offered prices on public pages, not transactions or sales volumes.
Defense counsel reviewing a demand letter
If your client's pages were recorded, test the allegation product by product: what was charged against what was claimed.
Works with
- Retailers' own storefronts (public product pages)
- Shopify, WooCommerce, Magento and other storefronts (read from public pages)
- CSV export (paid plans)
- REST API (Pro and up)
- MCP for Claude and other AI assistants
Pricing
Evidence packs are quoted per matter after a free, confidential first call. Monitoring is billed monthly in USD, cancel any time, 14-day money-back on every plan. The record cannot go backwards, so monitoring is how you start one on retailers you are watching.
Basic
$39 per month
Start a daily record on 2 retailers you are watching
- 2 monitored domains, 1 user
- Up to 10,000 products per store
- Price movement and discount tracking on supported websites
- CSV export
- Email support within 2 business days
Evidence pack
Custom quoted per matter
Scoped to the stores, products and period in your matter
- Free, confidential first call
- Daily price record per product
- 'Was/now' and '% off' claims recomputed
- US former-price context: how long and how recently charged
- EU 30-day lowest prior price where relevant
- Method note with every gap listed
Pro
$199 per month
A record running on up to 15 retailers
- 15 monitored domains, 5 users
- Up to 20,000 products per store
- REST API, 10,000 requests a month
- MCP and 10 RSS feeds
- Support within 1 business day
Compared with the alternatives
- Manual screenshots and the Wayback Machine
- Free and familiar. A screenshot proves one day; archive captures are irregular and may miss your products and dates.
- Waiting for discovery
- The retailer's data is the fullest source, but it arrives after filing, on the other side's timetable.
- Enterprise price-intelligence suites
- Built for retailers' pricing teams on ongoing subscriptions; not scoped to a per-product record for one matter.
What changed
- FTC Guides Against Deceptive Pricing (16 CFR Part 233): a former price must have been openly and actively offered, in good faith, for a reasonably substantial period in the recent, regular course of business. Source: ecfr.gov
- California Bus. & Prof. Code §17501 ties an advertised former price to the prevailing market price in the 3 months before the ad, unless the ad states when that price applied. Source: leginfo.legislature.ca.gov
- Hinojos v. Kohl's Corp. (9th Cir., 21 May 2013): a shopper who buys because of a false former price, and would not have bought otherwise, has standing under California's false advertising and unfair competition laws. Source: cdn.ca9.uscourts.gov
- People v. Overstock.com (Cal. Ct. App., 2 June 2017) affirmed USD 6,828,000 in civil penalties and an injunction over reference-price advertising, including 'compare at' prices. Source: caselaw.findlaw.com
What happens after you book
Nothing to install. You know what the record covers before you are quoted.
- First call: retailer, products, period, and what is already recorded.
- Scoping: products, dates and claims agreed; one clear quote.
- Record pulled: daily prices assembled and claims recomputed.
- Delivered: one record per product, with method note and gaps.
Security and data
- RivalSweeper reads public product pages only; no access to any store, ad account or analytics is needed.
- Every figure traces to a dated observation and its product URL.
- Days without an observation are listed as gaps; no price is estimated.
- The first call is free and confidential.
Questions
Can you show prices from before tracking started?
No. For stores already monitored the record goes back to when tracking started; for a new store it starts the day it is added. We tell you what exists on the first call, before any quote.
Will the evidence pack be admissible?
We do not promise admissibility in any court; that is for counsel to decide. Every price traces to a dated observation and the product URL, and the method and gaps are written down.
Is this legal advice?
No. This is not legal advice; RivalSweeper is not a law firm. We record public prices and do the arithmetic; whether a reference price was lawful is for you and your experts.
What if the claim ran in an email or an ad?
The record is built from public product pages. Tell us where the claim appeared and we will say plainly what the record can and cannot show.
Can an expert use it for damages work?
It is a daily series of offered prices with a stated method. It does not contain sales volumes, transaction data or checkout prices.
We act for the retailer. Can we use it?
Yes. The pack can check your client's own promotions as well as other stores' public pages, if those pages were recorded for the period.
Find out what the record covers for your matter
Tell us the retailer, products and class period. The button opens RivalSweeper's discount-verification page, where you book the free first call.
See how the evidence pack works