PriceProof 30
Terms of service
Last updated 19 August 2026
These terms apply to PriceProof 30 (“the app”) as installed on a Shopify store. Installing the app means accepting them.
What the app does
The app records the price of each product variant in the store as it changes, calculates the lowest price that was in effect during the last 30 days, and makes that figure available to the store's theme so it can be displayed on product pages.
It also makes two further disclosures available to the theme: the European Commission's harmonised notice on the legal guarantee of conformity, served as the Commission's own artwork in the official languages it publishes; and the GARAN durability label, into which the app writes the guarantee length, brand and model the merchant enters for a product. Both are published by the Commission under Commission Implementing Regulation (EU) 2025/1960. Their wording, colours and layout are fixed by that Regulation, and neither the app nor the merchant may alter them.
The GARAN label may lawfully be shown only where the manufacturer offers a free guarantee of durability of more than two years, covering the whole product. The app refuses to publish a shorter duration, but it cannot verify that such a guarantee exists: whether a product qualifies is the merchant's statement, and the merchant's responsibility.
What the app cannot know
This is the most important thing to understand before relying on the app. Shopify keeps no history of past prices, so the app can only report on prices it observed after it was installed. For the first 30 days the figure it shows is based on a partial window. A setting is provided to keep the widget hidden until a full window of history has been collected.
Legal compliance is the merchant's responsibility
The app exists because European law requires traders to disclose certain things: the EU Omnibus Directive requires a trader announcing a price reduction to state the lowest price applied in a preceding period, and Commission Implementing Regulation (EU) 2025/1960 requires the harmonised notice on the legal guarantee of conformity and governs the GARAN label. The app is a tool for recording and displaying this information. It is not legal advice and it does not certify or guarantee that a store complies with the Omnibus Directive, with Regulation (EU) 2025/1960, or with any other law.
Whether a disclosure is required for a particular product or store, whether what is displayed satisfies the obligation in a particular country, how it must be worded, where it must appear and over what period a figure must be calculated all remain the merchant's responsibility to determine. The merchant should confirm their own requirements, and is responsible for verifying that what is shown on their storefront is correct for their purposes.
Availability
The app is provided on a reasonable-effort basis. It depends on Shopify delivering webhooks and on third-party hosting, and no specific uptime is guaranteed. Should a webhook be missed, a periodic full re-synchronisation is designed to bring the recorded prices back into line.
Plans and payment
Plans differ in how many products the app publishes for. Products beyond a plan's allowance continue to have their price history recorded, but their widget stays hidden until the plan is upgraded, and the same allowance governs how many products may carry a GARAN label. The legal guarantee notice is included on every plan, including the free one, and is not limited by the number of products.
All charges are handled by Shopify and appear on the store's regular Shopify invoice. The app never takes payment details. Cancelling the subscription or uninstalling the app ends future charges in line with Shopify's billing rules.
Acceptable use
The app may not be used to display price information the merchant knows to be inaccurate or misleading, nor may it be reverse engineered, resold or redistributed.
Liability
The app is provided without warranties of any kind, whether express or implied. To the fullest extent permitted by law, liability for indirect, incidental or consequential loss — including lost sales, lost profits, and fines or penalties imposed by any authority — is excluded. Nothing in these terms limits liability where the law does not allow it to be limited.
Data
What the app stores, where, and how it is deleted is described in the privacy policy, which forms part of these terms.
Termination
A merchant may stop using the app at any time by uninstalling it from their Shopify admin. Tracking stops immediately and stored data is erased as described in the privacy policy.
Changes
These terms may be updated. The date at the top of this page reflects the current version, and material changes are communicated to merchants using the app.
Contact
Questions about this policy or your data: alex.antoniuk2@gmail.com.