Privacy Policy

Last updated: October 2026

This policy describes how Pregnancy Week Tracker (pregnancyweektracker.com) handles information. The data controller / site operator is Vinod Isaac. Contact: hello@pregnancyweektracker.com.

Pregnancy-related dates (last menstrual period, due date, conception or IVF transfer date, cycle length) are sensitive. We no longer place them in page URLs, so they are not sent to analytics or ad systems as query parameters.

1. What this site does

Week and due-date calculations run in your browser. Tools such as the kick counter and contraction timer also keep their working state on your device. We do not operate a user-account database for these tools.

2. Information stored on your device

Depending on which tools you use, the site may write to localStorage and/or sessionStorage, including:

• pwtSavedLMP — last menstrual period date you entered (or LMP-equivalent from other modes)
• pwtSavedDue — estimated or entered due date
• pwtSavedCycle — cycle length
• pwtSavedMode — calculator mode (LMP, due date, conception, IVF Day 3, or IVF Day 5)
• pwtSavedConception — conception date when using conception mode
• pwtSavedTransfer — IVF transfer date when using IVF Day 3 or Day 5 mode
• pwtChecklistState — checklist tick state
• kcHits — kick-counter hits
• ctHistoryList — contraction-timer history
• pwt_week_notes — lightweight notes from the calculator
• pwtImageTabPref — fruit vs object size comparison preference

These values stay on your device unless you clear them (see below). Session copies of LMP/due/cycle help keep URLs clean while you browse week pages in the same browser session.

3. Third-party services

Like many free websites, we load third-party scripts that may set cookies or receive technical data (IP address, user agent, page URL, approximate location, device type):

• Google Analytics 4 (measurement ID G-LVGV89T5QG) — traffic and usage analytics. We configure query-parameter redaction for lmp, due, and cycle.
• Google AdSense (publisher ca-pub-2959862133855422) — advertising. AdSense uses advertising cookies and similar technologies to show and measure ads. This is not “no advertising cookies.” For EEA/UK visitors, a Google-certified Consent Management Platform (CMP) must also be enabled in the AdSense console; site-level Consent Mode defaults are not a substitute.
• Sentry — client-side error monitoring so we can fix bugs. Session replay sampling is disabled. We strip query strings from reported URLs where possible.
• OpenMoji CDN / image CDNs — icons and some images are loaded from third-party CDNs; those requests include the usual browser request metadata.
• Amazon Associates — product links may include our affiliate tags. If you buy through those links, Amazon may credit a commission. Affiliate links are marked with rel="sponsored" where generated by our scripts.

Each provider has its own privacy policy. We do not control how Google, Amazon, Sentry, or CDNs process data once their scripts or links are used.

4. What we do not claim

We do not claim that “nothing is sent to any server” or that we use “no advertising cookies.” Analytics, ads, and error monitoring involve network requests to third parties. Calculations themselves are client-side; marketing and reliability tooling are not.

5. How to clear your data

• In your browser: clear site data / cookies for pregnancyweektracker.com (this removes localStorage, sessionStorage, and cookies for this origin).
• Or open the browser console on this site and run: localStorage.clear(); sessionStorage.clear();
• Use browser controls or Google’s ad settings to limit ad personalisation where available.

6. Children

This site is intended for adults seeking pregnancy information. It is not directed at children under 13 (or the equivalent age in your jurisdiction).

7. Changes

We may update this policy as the site changes. The “Last updated” date at the top will change when we do.

8. Contact

Questions about privacy: hello@pregnancyweektracker.com or the contact page.