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Privacy Policy

Last updated 27 June 2026.

Sleep Caffeine ("we", "us") respects your privacy. This page explains what we collect and why.

What we collect

The calculators run entirely in your browser — the weights, times and drinks you enter are not sent to us or stored. We use privacy-friendly, aggregate analytics to understand which pages are used, without identifying individual visitors.

Cookies & advertising

We may use third-party advertising, including Google AdSense. Third-party vendors, including Google, use cookies to serve ads based on prior visits to this and other websites. Google's use of advertising cookies enables it and its partners to serve ads based on your visits. You can opt out of personalised advertising via Google Ads Settings, and learn more at How Google uses data when you use our partners' sites or apps. Visitors in the EU/UK/California are shown a consent choice before any advertising cookies are set.

Affiliate links

Some links go to Amazon. As an Amazon Associate we earn from qualifying purchases. These links don't change the price you pay and don't share extra personal data with us.

Your rights

Because we don't collect personal accounts, there's little personal data to access or delete. For any privacy question — including data requests under GDPR or CCPA — email [email protected].

Children

This site is intended for general audiences and is not directed at children under 13.

Changes

We may update this policy; the "last updated" date above will change accordingly.