Legal
Cookie Policy
Version 1.1 | Last updated: 17 September 2026
1. What Are Cookies
Cookies are small text files placed on your device when you visit a website. Similar technologies including pixel tags, web beacons, and local storage are also covered by this policy.
2. Who We Are
CellSync Limited is the data controller for cookies set on cellsync.co.uk. Company Registration Number: 17091767. 128 City Road, London, EC1V 2NX. support@cellsync.co.uk
3. The Law
Our use of cookies is governed by the Privacy and Electronic Communications Regulations 2003 (PECR) and UK GDPR. We are required to obtain your consent before placing any non-essential cookies on your device. Strictly necessary cookies are exempt from this requirement.
4. Types of Cookies We Use
4.1 Strictly necessary cookies
Essential for the website to function. Cannot be disabled. Includes session, security, authentication, shopping bag, and cookie consent preference cookies. No consent required.
4.2 Functional cookies
Enable enhanced features and personalisation. May include language preferences, remembered login preferences, and recently viewed products. Require consent.
4.3 Analytics cookies
Help us understand how visitors use the website. Includes Shopify's built-in store analytics. Require consent.
4.4 Marketing cookies
Track browsing activity to deliver relevant advertising and to measure whether our advertising works. We use the Meta Pixel, provided by Meta Platforms Ireland Limited, on cellsync.co.uk. Where you consent to marketing cookies, it records the pages you view, items you add to your bag, and purchases you complete, and associates that activity with your Meta account if you have one. It is used for advertising measurement and targeting only, and it never receives your skin-scan, allergy or health data.
These cookies are set only after you consent. You can decline them, or withdraw consent later, through the cookie banner or the "Cookie Settings" link in our footer — the site works normally either way.
4.5 Third-party cookies
Meta (Facebook and Instagram) — advertising measurement and targeting via the Meta Pixel — facebook.com/privacy/policy
Shopify — our e-commerce platform; sets strictly necessary cookies for the shopping bag and checkout, and its own store analytics cookies — shopify.com/legal/privacy
PayPal — sets cookies as part of the PayPal payment option at checkout — paypal.com/uk/legalhub/privacy-full
Klaviyo — email marketing tracking if you follow a link from our emails — klaviyo.com/legal/privacy-notice
5. Cookie Inventory
The main cookies set on cellsync.co.uk are listed below. Durations are indicative and set by the provider, not by us. This list is reviewed when our tools change.
| Cookie | Set by | Category | Purpose | Typical duration |
|---|---|---|---|---|
| cart, cart_currency | Shopify | Strictly necessary | Remembers the contents and currency of your shopping bag | Up to 2 weeks |
| localization | Shopify | Strictly necessary | Remembers your country and language selection | 1 year |
| shopify_client_id | Shopify | Strictly necessary | Maintains your session across pages | Session |
| _shopify_y, _shopify_s | Shopify | Analytics | Store analytics — how visitors move through the site | _shopify_y 1 year · _shopify_s 30 minutes |
| _fbp | Meta | Marketing | Identifies your browser for advertising measurement and targeting | 90 days |
| _fbc | Meta | Marketing | Records that you arrived from a Meta advert, so the resulting visit can be attributed | 90 days |
6. Managing Your Preferences
6.1 Cookie consent banner
When you first visit cellsync.co.uk you will see a cookie consent banner. You can accept all, reject non-essential, or customise by category. Choices are saved for 12 months.
6.2 Changing preferences
Click "Cookie Settings" in the website footer at any time to update your preferences.
6.3 Browser settings
You can control cookies through your browser: Chrome (Settings → Privacy and Security → Cookies), Safari (Settings → Privacy → Block All Cookies), Firefox (Settings → Privacy & Security → Cookies and Site Data), Edge (Settings → Cookies and Site Permissions).
6.4 Opting out of advertising cookies
As well as our banner, you can manage how Meta uses your data for advertising in your Meta account settings under "Ad preferences", and you can opt out of interest-based advertising from participating companies at youronlinechoices.com/uk.
7. Cookies in Our Mobile App
The CellSync mobile app does not use browser cookies. The app uses local device storage (AsyncStorage) only for essential session data. This is not accessible to third parties and is not used for advertising or tracking.
8. Changes to This Policy
Material changes will be notified via the cookie consent banner on your next visit. Version 1.1 added the Meta Pixel and a full cookie inventory.
9. Contact Us
support@cellsync.co.uk
CellSync Limited
128 City Road, London, EC1V 2NX
ico.org.uk | 0303 123 1113 (ICO)
Questions about this policy? Email support@cellsync.co.uk.