Price history tracker
Every serious shopper eventually asks the same question: was this actually cheaper before? Price history trackers answer that. TagTrue answers a harder one — is the retailer legally allowed to call the higher number a "was" price at all?
Two different questions, two different tools
Price history tracker
Shows what a product cost over the past weeks or months. Great for buying at a good moment. Doesn't judge whether the marketing around the price is honest.
TagTrue
Verifies whether the strike-through reference price was ever the actual selling price within 90 days — the standard California law applies to advertised discounts.
Why the difference matters
A tracker can show that a product's real price has been $99 for six months. But if the retailer keeps advertising it as "$180 → $99" the whole time, that's not just a permanent sale — under California BPC §17501, the $180 stopped being a valid reference price on day 91. The tracker sees a flat line. TagTrue sees a 90-day rule violation.
How TagTrue tracks prices
- Daily automated scans. Watched product URLs are checked each day. Sale and reference prices are captured with timestamps.
- Community observations. Anyone can add a timestamped screenshot to an existing report, extending the timeline.
- 90-day qualification. Once a "sale" has been observed for more than 90 days, the report is automatically qualified under the rule.
Add a product to daily tracking
Sign in, drop a product URL onto your watchlist, and TagTrue scans it daily. Findings that meet the 90-day rule become public verified reports.
FAQ
What's the best free price history tracker?
It depends on what you're checking. CamelCamelCamel and Keepa track Amazon; Honey and Cully show short-term histories on many retailers. For legality of the discount specifically — whether the crossed-out reference price is even real — TagTrue tracks that on watched retailers and publishes verified reports.
How is TagTrue different from a price history tracker?
Price trackers tell you what a product cost over time. TagTrue tells you whether the retailer's advertised discount is honest — whether the strike-through 'was' price was ever really the price in the last 90 days. It's the legal-compliance angle a normal tracker doesn't cover.
Can I add a product for TagTrue to watch?
Yes. Signed-in users can add product URLs to a personal watchlist. TagTrue's automated scanner checks watched URLs daily and captures price observations that build the 90-day timeline on any reported violation.