Infinity Data Systems has launched the first version of SimpleBooks, an invoice and billing program. The highlight is its interface, which is said to be intuitive enough that reading the manual is unnecessary. Aside from its primary purposes, the software can also be used to create estimates, and track important information such as time, customers and inventory. Users can further generate reports, and export their data to a backup that can be restored at will. SimpleBooks can be downloaded for $10 in Intel-only or Universal Binary versions, and requires Mac OS X 10.2 or higher.