Privacy and analytics choices
Last updated: 13 October 2026. This notice applies to the directory presented at gufenxueshu.com and the helicard.com version of the same service.
Operating the website
The server processes information needed to deliver pages and protect the service, such as IP addresses, requested URLs, browser information and request times. Operational logs may contain this information. Captcha or session functionality may use necessary cookies when you submit a tool. Do not include confidential research, passwords or API keys in submissions or URLs.
Analytics
Optional analytics is disabled. No Google Analytics, Google AdSense or Microsoft Clarity tracking scripts are loaded.
Tool submissions and contact
We process the tool information and optional contact email you submit to review the resource and respond to corrections. Submission contact details are not intended for publication as directory content. Please provide only information needed for that purpose. Contact us to request correction or removal of personal information associated with a submission.
External websites
Opening a provider link takes you to a different website with its own privacy practices. Do not upload private research or participant data to a listed tool without reviewing its terms and obtaining any necessary permissions.
Advertising
This version of the directory does not load Google advertising or Google Analytics scripts. Before Google advertising is introduced, this notice and any required consent mechanism must be updated to explain the actual data collection, cookies, third-party processing and user choices. We do not treat an analytics choice as consent to advertising.
Contact and retention
For privacy requests, contact helicardcom@gmail.com and identify the information concerned without sending additional sensitive data. Information is retained for the relevant operational, moderation or security purpose; contact us for a review of information associated with your submission. We do not promise a provider-specific deletion period that has not been verified.