Contact
You can reach Calxsolver by email. There is no contact form and no account needed — a plain email is fine.
Write to support@calxsolver.com. This is the best channel for questions about a solver, feedback on the site, or general enquiries.
What to include
For general requests, it helps to say which page or solver you are asking about and what you are trying to do. The more specific you are, the faster we can help.
Found a mistake?
If a solver looks like it produced a wrong result, the Report an error page lists exactly what details to send so we can reproduce and fix it.