Optionally available as double-entry bookkeeping (according to Käfer or Kmu) or as a cash book. Simple and understandable introduction with plenty of assistance. Tens of thousands of users have relied on Q3's proven products for years. Freely expandable account templates with an unlimited number of accounts and transactions. Automatic year-end closing. Create, change, and delete accounts and transactions until they are closed. Well-designed evaluations (account overview, balance sheet, income statement, budget, etc.) available at the click of a mouse, at any time and within seconds, even as a preview. Eye-friendly screen design with excellent legibility. Password protection and backup function included. Extensible with options such as Q3 payment transactions, Q3 address, Q3 billing document, and Q3 wage. Upgrade to a higher variant possible at any time without data loss. Download manual and online help available. Support via website, email, or helpline. Guarantees the latest version for initial installation thanks to download via the Internet.