Privacy Policy

Last updated: 20 April 2026

BuildMetricLab is operated by Brightscale Labs Limited

(registered in England & Wales). We take your privacy seriously and

process personal data in accordance with the UK General Data

Protection Regulation (UK GDPR) and the Data Protection Act 2018.

What we collect

• Calculator inputs: the numbers you type into calculators are

processed locally in your browser. They are not transmitted to

our servers or stored on our end.

• Anonymous usage analytics: we record a per-page ping containing

page path, approximate device type (mobile/desktop), and referrer

hostname. This contains no cookies, no IP addresses, and no

information that can identify you personally.

• Voluntary feedback: if you submit feedback through the site, we

store the message plus any contact email you choose to provide, to

reply to you. You can request deletion at any time.

What we do not do

• We do not set advertising or tracking cookies.
• We do not sell personal data to third parties.
• We do not share your calculator inputs with anyone.
• We do not use your data to train AI models.

Legal basis

Anonymous analytics rely on our legitimate interest in

understanding site usage to improve the tools. Feedback

correspondence relies on your consent (pressing Send).

Your rights

Under UK GDPR you may request access to, correction of, or deletion

of any personal data we hold about you, and object to processing.

Contact: [email protected].

If you are unhappy with how we handle your data you may complain to

the Information Commissioner's Office (ico.org.uk).