Beancount/hledger Auslandsumsatz-Check (UStG) — Licence

Free scope
  Prüft das geöffnete Journal mit allen 10 Regeln und zeigt jeden Befund mit Zeilennummer, Paragraf und überfälligen Tagen – ohne Schlüssel. is free for any use, personal or commercial, for as long as you keep the
  extension installed, and the online check at the product page is free without registration.

Paid scope
  Prüft alle Journale im Workspace in einem Lauf und schreibt einen Befundbericht (Datei, Zeile, Paragraf, überfällige Tage) für den Steuerberater. is the paid part. It asks for a licence key issued at purchase (one seat, one key). The key is checked against the payment provider and
  cached locally for 30 days so it keeps working offline.

Redistribution
  You may not resell, re-host or bundle this extension or its rule set. The rule set and the
  engine are provided as-is; check results are advisory and do not constitute legal advice.

(c) ReadyStack — https://getreadystack.com
