Privacy Policy

Last updated: 24 June 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 (no cookies): when a calculator is used we record an anonymous event containing the tool, the inputs and result, approximate country/region and device type (from network headers). It contains no cookies, no IP addresses, and no information that can identify you personally.
• Optional analytics — Microsoft Clarity: if you consent to analytics through the InMobi Choice consent message, we load Microsoft Clarity, which records aggregated heatmaps and anonymised session replays to help us improve the tools. Input fields are masked, so the values you type are not captured. Clarity runs only with your consent and you can withdraw it using the Cookie preferences link in the footer. See our Cookie Policy for the cookies it sets.
• 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 cookies; we set analytics cookies only if you accept them.
• 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.

Who processes your data

• Microsoft (Clarity) — heatmaps and session replay, only after you consent. See Microsoft's Privacy Statement.
• InMobi (Choice) — the certified consent management platform that shows the consent message and records your advertising and analytics consent choices. See InMobi's Privacy Policy.
• Cloudflare — hosting, content delivery, and the worker that records the anonymous, cookieless usage events described above.

Legal basis

The anonymous, cookieless usage analytics rely on our legitimate interest in understanding site usage to improve the tools. Microsoft Clarity relies on your consent (given through the InMobi Choice consent message). 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: contact@brightscalelabs.com.

If you are unhappy with how we handle your data you may complain to the Information Commissioner's Office (ico.org.uk).