Privacy Policy

Last updated: 19 August 2026

This policy explains what Watch Size Check collects, why, and how long we keep it. It covers two different groups of people, whose data we treat differently: retailers who have an account with us, and shoppers who use the virtual try-on on a retailer's website.

Watch Size Check is operated by KW Assets, LLC, PO Box 10013, Washington, DC 20018-0013, USA. For any privacy question or request, contact privacy@watchsizecheck.com.

Shoppers: the try-on on a retailer's website

Your wrist photo stays on your device. The measurement runs entirely in your browser. The photo is not uploaded to us, and we never store it. What reaches our servers is a short list of numbers describing the measurement — roughly eighty values — with no image attached. Those numbers are not stored. Our server computes the measurement, returns it, and keeps no record of the request.

There is one exception. If you choose "use my phone", your photo is uploaded so it can be transferred from your phone to the computer you are shopping on. That upload is automatically deleted after one day and is never used for anything else.

What we record about your visit. If the retailer has enabled our analytics, we record that a try-on happened, the watch case size shown, and — through a Shopify web pixel — that a product was added to a cart or an order was completed, together with the products, quantities and totals involved. We use this only to tell the retailer whether the try-on helps people buy.

We do not receive anything that directly identifies you. Shopify does give our analytics a pseudonymous visitor identifier it generates, which lets us connect a try-on to a later purchase from the same browser. Data of that kind can still count as personal information under laws such as the GDPR even though we cannot tell who you are, so we treat it accordingly.

What we do not request or intentionally collect from shoppers: your name, email address, phone number, postal address, or payment details. Shopify's checkout does share those with apps that ask for them; our pixel does not read them, and our server discards anything outside a fixed list of commercial fields. Our pixel is declared to Shopify for analytics only — not marketing — and we do not sell or share this data.

Technical information our systems see. Like any web service, our servers receive the IP address a request comes from. We use it for one thing: rate limiting, to stop one source flooding the service. It is held for roughly two minutes as part of a short-lived counter and then expires automatically. IP addresses are also written to our server logs when a request is actually rate-limited, so we can investigate abuse; those logs are deleted automatically after 90 days. We do not use IP addresses to identify shoppers, to build profiles, or for advertising, and we do not run web-server access logs that record every visit.

Where your region requires consent for analytics, Shopify's customer privacy controls decide whether our pixel runs at all. If you have not consented, no events reach us.

Cookies we set on a retailer's storefront. One first-party cookie, wsc_tried_on, lasting 30 days, which records only that the try-on was used and does not identify you. Shopify separately uses its own cookies and similar technologies, and supplies our pixel with the pseudonymous visitor identifier described above, according to the retailer's Shopify privacy settings. Neither our cookie nor that identifier tells us your name or contact details.

A note on your cart. When you complete a try-on we add a note to your cart (wsc_tried_on, the case size, and a timestamp) so the retailer can see try-on activity in their own order records. The retailer can see this note. It contains only those three things — we do not put your name, contact details or wrist photo in it.

How long we keep it. Storefront analytics events are deleted automatically after about 13 months. Phone-transfer photos are deleted after one day. Server logs, including any IP addresses in them, are deleted after 90 days. Wrist measurement data is not kept at all.

Retailers: your account with us

When you create an account or install our Shopify app we hold your name and email address, your store's domain and contact email, your product catalogue data (titles, images and watch case sizes), and records of your subscription. We use these to run the service, process payments, and contact you about your account. If you send us the "Get started" form we also keep the IP address and browser user-agent it came from, to filter spam submissions.

Payments are handled by Stripe. We receive and store an identifier for your customer and subscription and your payment status; we never receive or store your full card number.

We access your Shopify store only to the extent our app's permissions allow: reading and writing product information, and managing our own analytics pixel. We do not request access to your orders or your customers.

If you uninstall the app, Shopify sends us a redaction instruction 48 hours later, and we then erase the data associated with your store — catalogue records, stored images, API keys, analytics rows, usage counters and access tokens. We keep billing and accounting records where tax, audit or fraud-prevention obligations require it. We also handle the shopper data-request and redaction instructions Shopify sends us; no shopper record exists on our side to hand over or erase, and we answer them saying so.

Who else handles this data

Our service providers are Amazon Web Services for hosting and storage, Clerk for retailer sign-in, Stripe for payments, and Shopify where the app runs on a store. Each handles data under its own terms. We do not currently use any advertising network, behavioural analytics service, error-tracking service or third-party email provider. If that changes we will update this policy.

Data is stored and processed in the United States (AWS US East, Northern Virginia). The service providers named above may process data in other countries under their own terms.

Your rights

Depending on where you live, you may have the right to access, correct, delete or export your personal data, to object to or restrict processing, and to complain to a supervisory authority. Contact privacy@watchsizecheck.com and we will respond within 30 days.

Shoppers: our storefront analytics hold no name, email or address, so on our own we usually cannot connect those records to a specific person, and we may need more information from you before we can act on a request. If you make a privacy request through a retailer whose store uses Watch Size Check, we will help that retailer answer it, and we act on requests that reach us through Shopify's required privacy mechanisms.

When we may have to share information

Besides the service providers named above, we may disclose information where reasonably necessary to comply with the law, legal process or an enforceable government request; to investigate suspected abuse or fraud; to protect the security and integrity of the service; or to establish or defend legal claims. We do not sell personal information, and we do not share it for cross-context behavioural advertising.

If Watch Size Check or substantially all of its assets are acquired, merged or reorganised, information associated with the service may transfer as part of that transaction, subject to applicable law and to this policy.

Children

The service is not directed at children under 16 and we do not knowingly collect their data.

Changes

If we change this policy we will update the date above and, for material changes affecting retailers, notify account holders.

Contact

KW Assets, LLC, PO Box 10013, Washington, DC 20018-0013, USA — privacy@watchsizecheck.com. Our Terms of Service set out the governing law for our agreement with retailers; this policy applies alongside whatever privacy law covers you.