Contact
Last updated: 11 June 2026
We are a small, independent software maker and we read every message. The best way to reach us is by email — please include enough detail (and screenshots, if helpful) so we can help quickly.
Support & billing
For help with the app, your account, subscriptions, cancellations or refunds:
[email protected]
Paid subscriptions are handled by our Merchant of Record, Dodo Payments; you can also manage a subscription from the link in your Dodo Payments receipt email. See our Refund & Cancellation Policy.
Privacy & data requests
For privacy questions or to exercise your data-protection rights (access, correction, deletion, and so on):
[email protected]
Post
Shamil Niyas, trading as Shamrocks Games
Neue Heimat 16
65795 Hattersheim am Main
Germany
Response times
We aim to reply to email within two business days. Complex billing or data requests can occasionally take a little longer, and we will let you know if so.
Full business details, including our VAT identification number, are in our Legal Notice (Impressum). BillBook Business is business record-keeping software — not a bank, payment, lending, wallet, money-transfer, investment, insurance, legal-advice or tax-advice service.