Questions, corrections, content suggestions, collaborations, and support messages can be sent through the channels listed on this page.
The primary contact email is hdchae89@gmail.com. The mail link uses mailto:hdchae89@gmail.com.
Support and small donations can be sent through https://buymeacoffee.com/jjamsoon.
Calculation errors, country or city expansion requests, document corrections, and real-world scenarios are especially helpful. Include URLs, inputs, or the exact sentence when possible.
Not every message can receive an immediate reply, but calculation issues and policy questions are prioritized when possible. Legal advice, tax filing, and individualized investment advice are outside scope.
For calculation issues, include the inputs, country, currency, and page URL. For feature or content ideas, describe the real-world situation and the number you are trying to understand.
Suggestions become easier to implement when the reading context is concrete. A specific city budget, salary scenario, or subscription case is much easier to turn into a new page than a vague request.
Users tend to revisit the contact page when they think the calculation is wrong, when they hit an unsupported scenario, or when they spot a content issue. The page acts as a safety net for those cases.
A visible route for correction makes a small service feel much more trustworthy.
The contact page is more than a mailbox. On a small site, it is one of the first inputs into quality improvement.
Detailed bug reports help separate misunderstanding from a real calculation issue, and concrete suggestions reveal which new pages or tools are worth building next.
For users, the page also acts as a safety net. It makes the service feel more trustworthy because there is a visible route for correction and clarification.
Even when not every idea can be implemented immediately, repeated messages become clear product signals. If many users get stuck on the same salary rule or travel-budget context, that usually means a new page or section is worth building.
That is why the contact page matters beyond simple support. It is one of the main inputs for future content direction.
Where can I find the support link and contact email
Both are listed on this page and in the footer links. The main email is hdchae89@gmail.com, and the support link is https://buymeacoffee.com/jjamsoon.
What should I check before emailing about a strange result
First re-check the country, currency, inputs, quantity, and date assumptions. Then reread the page FAQ and methodology once. If the issue still remains, send the URL, inputs, expected outcome, and actual result. That sequence makes it much easier to separate misunderstanding from a real bug.
When is a message most likely to turn into a real feature or page
When the message points to a recurring real-world context. If multiple people stop at the same salary case, city budget, or subscription pattern, that usually becomes a strong reason to add a new page or tool.
Why does it help to read the related page first before sending a message
Reading the FAQ, methodology, and policy pages first often resolves simple misunderstandings and leaves only the real issue to report. That saves time for both the user and the operator.
Tax and customs outputs are estimates for comparison, not final filing or settlement values.