Quantro Cookie Policy

Quantro uses one strictly-necessary cookie to keep you signed in. We do not use analytics cookies, advertising cookies, tracking pixels, web beacons, social-media trackers, or any third-party cookie that profiles you. Because we use only strictly-necessary cookies, we do not display a cookie banner, in line with UK PECR and ICO guidance.

If you reject the strictly-necessary cookie in your browser, you will not be able to sign in to Quantro. The full detail is below.

Cookies are small data files stored on your computer or mobile device when you visit a website. Some keep you signed in, remember your preferences, or make pages load faster on a return visit. Others, used by third parties, can recognise you across websites and feed advertising or analytics. Quantro only uses the first kind.

Cookies set by the website you are on are called “first-party cookies”. Cookies set by anyone else are “third-party cookies”.

We set one strictly-necessary first-party cookie. It exists only to keep you signed in across pages.

We may also store a small amount of non-cookie data in your browser’s localStorage for the same purpose (session refresh tokens managed by Supabase), and a per-device theme preference (light or dark). Neither contains personal information beyond what is needed to keep your session alive and remember your display preference.

When you start a Premium subscription or link a bank account, you leave Quantro briefly to interact with our regulated partners. Those partners set cookies on their own domains, governed by their own policies, never on quantro.one:

• Stripe sets session and fraud-prevention cookies on checkout.stripe.com and billing.stripe.com while you complete a payment or manage your subscription. See Stripe’s cookie policy.
• Plaid sets cookies inside its bank-linking iframe on cdn.plaid.com and *.plaid.com while you connect a bank, governed by Plaid’s end-user privacy policy.

Quantro itself never reads those cookies. They only exist while you are interacting with the partner’s service.

For complete transparency, Quantro does not use any of the following:

• Advertising or remarketing cookies of any kind
• Third-party analytics cookies (Google Analytics, Mixpanel, Hotjar, Plausible, etc.)
• Social-media trackers (Meta Pixel, X / Twitter conversion tracking, LinkedIn Insight, TikTok Pixel, etc.)
• Tracking pixels or web beacons in marketing emails
• Flash cookies / Local Shared Objects (Flash is no longer supported by browsers)
• Cross-site tracking of any kind

We have no plans to add any of these. If we ever introduce a non-strictly-necessary cookie or pixel, we will update this policy, publish a consent banner, and ask for your opt-in before setting it.

Cookie consent banners and preference centres exist because most websites set cookies that the law (UK PECR, EU ePrivacy Directive) says require your consent: advertising, analytics, social media, profiling.

Quantro sets none of these. Strictly-necessary cookies do not require consent under PECR Regulation 6(4), so we do not need to ask, and there is nothing for you to opt out of. If that ever changes, we will add a banner.

You can clear or block all cookies at any time using your browser’s settings. Note that if you block the Quantro auth cookie, you will not be able to sign in.

• Google Chrome
• Apple Safari
• Mozilla Firefox
• Microsoft Edge

Some websites use web beacons (sometimes called “tracking pixels” or “clear gifs”), Local Shared Objects, fingerprinting libraries, or session-replay tooling to track visitors. Quantro does not use any of these.

We also do not place tracking pixels in any emails we send (sign-in links, password resets, billing receipts, allowance reminders).

Quantro does not run advertising on the website or app, and does not allow third parties to serve advertising through us. None of your information is shared for advertising or remarketing.

We may update this Cookie Policy if we change the cookies we use or to reflect changes in law. The “Last updated” date at the top of this page reflects the most recent revision. If we make material changes, we will post a notice in the app or email registered users at least 14 days before the change takes effect.

For questions about this Cookie Policy or our use of cookies, contact us:

Email: support@quantro.one

Phone: +44 7438 295736

Postal address:
Quantro
Waverley House
9 Noel St
London W1F 8GQ
United Kingdom