Frequently Asked Questions
Answers about privacy, accuracy, languages, and using HDate Tools.
Are the tools free?
Yes. Core tools are free and do not require an account.
Do you save dates, text, or passwords?
Sensitive tools are designed to run locally. The contact forms save only the information you intentionally submit.
Does the date converter use Umm al-Qura?
It uses the browser Umm al-Qura calendar where supported. Observed dates can still vary by one day.
Why are popular tools empty?
Popularity is shown only after real usage is recorded; no invented counts are used.
Can I install the site?
Supported browsers can install it as a PWA after the service worker is available over HTTPS.