Privacy Policy

The protection of your personal data is important to me. Below you will find information about which data is processed when you use Fuel Calc.

Florian Zahn

Zum Schlößli 9a

78464 Konstanz, Germany

E-mail: therealkarle@gmail.com

Fuel Calc operates entirely locally in your browser. The nutritional data you enter (glucose, fructose, sucrose, starch, etc.) as well as all calculations of the glucose-to-fructose ratio take place exclusively on your device. No inputs, nutritional data, or results are transmitted to a server.

The screenshot recognition (OCR) also runs entirely locally in your browser using Tesseract.js. Screenshots you upload or paste never leave your device.

With your consent via the cookie notice, the app stores your last inputs and your settings (e.g. your selected ratio preset) in your browser's local storage. This data remains on your device and is not shared with third parties. You can remove this data at any time via the "Clear" button in the app or by deleting your browser data.

This storage is technically necessary to restore your inputs when you visit the site again (Art. 6(1)(f) GDPR or your consent under Art. 6(1)(a) GDPR).

This website uses Google Analytics 4, a web analytics service provided by Google Ireland Limited, Gordon House, Barrow Street, Dublin 4, Ireland ("Google"), to understand how the calculator is used (e.g. page views, approximate region, device and browser type, referring source). Your IP address is truncated (IP anonymisation) before any storage.

Google Consent Mode v2 is implemented. Until you actively accept via the cookie notice, all consent signals (analytics_storage, ad_storage, ad_user_data, ad_personalization) are set to "denied", so no analytics cookies are set and no identifiers are stored on your device. If you decline, they remain denied for the entire visit.

Legal basis: your consent pursuant to Art. 6(1)(a) GDPR and Section 25(1) TDDDG. You can withdraw your consent at any time via the "Cookie settings" link in the footer or by deleting your browser data. Withdrawal does not affect the lawfulness of processing carried out before it.

Processing may involve a transfer of data to Google LLC in the USA. Google is certified under the EU-U.S. Data Privacy Framework, and Google's standard contractual clauses apply in addition. Analytics data is retained for a maximum of 14 months. Further information: Google Privacy Policy.

No advertising services or advertising cookies are used, and your nutrition inputs, screenshots and calculation results are never sent to Google or any other third party — they are processed only in your browser.

When you access the website, the hosting provider automatically processes technical access data (e.g. IP address, date and time of access, browser type) in server log files. This data serves to ensure smooth operation and IT security (Art. 6(1)(f) GDPR) and is regularly deleted automatically. It is not merged with other data.

The website contains links to external offerings (e.g. Fuel Lens, Linktree, GitHub). When you click these links, you leave the website. The respective provider is responsible for data processing on those external pages; their privacy policies apply.

You have the right of access (Art. 15 GDPR), rectification (Art. 16 GDPR), erasure (Art. 17 GDPR), restriction of processing (Art. 18 GDPR), data portability (Art. 20 GDPR), and objection (Art. 21 GDPR). You also have the right to lodge a complaint with a data protection supervisory authority.

Since Fuel Calc does not store any personal data on servers, there are no data records from app usage that I would be required to provide access to or delete.

I reserve the right to amend this privacy policy so that it always complies with current legal requirements. The version published on this page applies.