Contact us
Last updated: 2026-10-23
We usually reply within 1–2 business days (China time, UTC+8).
What you can contact us about
- A result that differs from a reference manual or other software: please include the raw data, specification limits and the result you compared against.
- Errors or unclear points in a tool explanation.
- New tools or features you would like.
- Payments: not unlocked after paying, invoices, duplicate charges — include the payment time, amount and channel (Afdian or Stripe).
- Account issues: sign-in, recovery, deleting your account and saved data.
- Partnerships and on-premise deployment enquiries.
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