1. Overview
FastingCalc ("we", "our", or "us") operates the website myfastingcalc.com. This Privacy Policy explains what data we collect, how we use it, and your rights regarding that data.
Core principle: Your fasting calculations run entirely in your browser. Our calculator code does not transmit your entered health data or fasting times to our servers. Hosting requests, optional analytics, and emails you send us have separate data implications.
2. Data We Collect
a) Calculator Data (Not Collected)
All calculator inputs — including your fasting start time, weight, height, age, and goal — are processed exclusively in your browser using client-side JavaScript. The calculator code does not send these inputs to our server. The live timer saves your active schedule and up to seven finished sessions in browser local storage. Use History to clear finished records or clear site data to remove all timer records.
b) Analytics Data (Google Analytics 4)
We use Google Analytics 4 (measurement ID: G-FSNGSG4799) to collect usage data, only after you allow analytics, including:
- Pages visited and time spent on each page
- Approximate geographic location (country/city level only)
- Browser type, operating system, and screen size
- Referring website or search engine
- Events such as button clicks and calculator interactions
Analytics may include online identifiers and device information; it is not necessarily anonymous. We do not intentionally send calculator inputs or your contact email to Google Analytics. Google's privacy policy governs data collected by Google Analytics: policies.google.com/privacy.
c) Advertising Data (Google AdSense)
We are preparing to use Google AdSense (publisher ID: ca-pub-2876447698247675). Advertising scripts are currently disabled; the site contains verification metadata and an ads.txt entry. Before ads are enabled, we will configure the required advertising consent mechanism and update this notice.
If enabled, Google and its partners may use cookies or similar technologies to serve and measure ads, including personalized ads based on visits to this and other websites where consent permits. Our analytics choice does not grant advertising consent.
You can opt out of personalised advertising at: google.com/settings/ads. You can also opt out via the NAI opt-out page.
For more information about how Google uses data when you use our site, see How Google uses data from sites that use Google's services.
You can opt out of Google Analytics data collection via the Google Analytics Opt-out Browser Add-on.
Hosting and correspondence
Serving a web page involves network information such as an IP address and requested URL, which hosting providers may log for operation and security. If you email us, your email provider and ours process the message, and we use its contents to respond. Avoid sending sensitive medical information. Contact us to ask about or request deletion of correspondence.
3. Cookies
The site uses browser storage for timer state and your analytics choice. Optional analytics may set cookies after consent. Advertising entries below describe planned use, not currently loaded services:
| Cookie Type | Provider | Purpose | Can Opt Out? |
|---|---|---|---|
| Local storage | FastingCalc | Timer state and analytics preference | Clear site data to remove |
| Analytics | Google Analytics 4 | Optional usage measurement | Yes |
| Advertising (planned) | Google AdSense | Ad personalisation and measurement | Yes |
| Advertising (planned) | DoubleClick (Google) | Ad conversion tracking | Yes |
Use Cookie settings at the bottom of any page to allow or decline analytics. Withdrawing consent reloads the page to stop analytics and removes first-party Google Analytics cookies. You can also control cookies through your browser settings. Disabling cookies may affect the functionality of third-party services (Google Analytics, AdSense) but will not affect the core calculator functionality of this site.
4. Your Rights (GDPR / CCPA)
Depending on your location, you may have the following rights:
- Right to access — Request a copy of data we hold about you
- Right to erasure — Request deletion of your personal data
- Right to opt out — Opt out of data collection for advertising purposes
- Right to portability — Receive your data in a portable format
- Right to object — Object to processing of your data for certain purposes
As we do not collect personal health data, most data rights apply to analytics data held by Google. To exercise your rights regarding Google's data, contact Google directly or use the Google Data & Privacy dashboard.
To exercise any rights related to our site specifically, contact us at: aknexus.usa@gmail.com
5. Data Retention
- Calculator data: Inputs are processed in the browser; the timer keeps the active schedule and the last seven finished sessions locally
- Google Analytics data: Retention depends on the property settings and data type; contact us for the currently configured retention period
- AdSense cookies: Not currently set by site advertising scripts; future advertising will follow the applicable consent and retention notices
- Cookie consent preference: Stored in browser localStorage until changed or site data is cleared
6. Third-Party Links
Our blog articles contain links to external websites (PubMed, Mayo Clinic, NIH, and others) for scientific citations. FastingCalc is not responsible for the privacy practices of these external sites. We recommend reviewing their privacy policies before interacting with their content.
7. Children's Privacy
FastingCalc is not directed at children under the age of 13. We do not knowingly collect personal information from children under 13. Intermittent fasting is not recommended for minors — see our Medical Disclaimer.
8. Changes to This Policy
We may update this Privacy Policy from time to time. The "Last updated" date at the top of this page reflects the most recent revision. Continued use of FastingCalc after changes constitutes acceptance of the updated policy.
9. Contact Us
For any privacy-related questions or to exercise your data rights, contact us at: