Cookie policy
Last updated 8 November 2026
This policy explains what information decodED stores on your device and why. It should be read together with our Privacy notice.
1. Summary
decodED does not use advertising, tracking or analytics cookies. We only store information on your device where it is strictly necessary to provide the service you have requested. For this reason, decodED does not display a cookie consent banner.
2. What we store and why
Instead of cookies, decodED uses your browser's local storage and session storage. The information stored is used only to operate decodED and is not shared with third parties.
| Item | Purpose | Duration |
|---|---|---|
| Authentication session | Keeps you signed in as you move between pages | Until you sign out |
| Unsaved entries | Preserves information you have entered before signing in, so it is not lost if the page is reloaded | Until the session ends or browser data is cleared |
| Display preferences | Remembers your last map view, panel layout, map detail setting and device type | Until browser data is cleared |
| Guidance progress | Records which guidance prompts you have already seen | Until browser data is cleared |
3. Legal basis
Under the Privacy and Electronic Communications Regulations 2003 ("PECR"), consent is not required for storage that is strictly necessary to provide an online service explicitly requested by the user. All of the items listed above fall within this exemption.
4. Analytics and error monitoring
We measure use of decodED with Vercel Web Analytics, which does not use cookies, does not store information on your device and does not identify individual visitors. We monitor technical errors with Sentry, which records the error and the page on which it occurred but not your IP address or account details. Neither service requires consent under PECR. If we introduce any technology that does require consent, we will update this policy and ask for your consent before it is used.
5. Third-party content
Maps, fonts and software libraries are delivered to your browser directly by third-party providers, including Esri, Ordnance Survey, MapTiler, OpenStreetMap, Google Fonts, jsDelivr and unpkg. These providers receive your IP address in order to deliver their content. We do not permit them to use decodED to track you. Further details are given in our Privacy notice.
6. Paying for decodED Pro
When you sign up, you pay on Stripe's own checkout page, outside decodED. Stripe uses its own cookies on that page to process the payment and prevent fraud. They are covered by Stripe's own cookie policy, at stripe.com/legal/cookies-policy, not by this one. decodED itself sets no cookies when you pay.
7. Managing stored information
Signing out removes your authentication session. You can remove all other stored information at any time by clearing this site's data in your browser settings. decodED will continue to work, but will not remember your preferences.
8. Contact
If you have any questions about this policy, please contact us at info@netzeroadvisory.uk.