Marketcircle has shipped Daylite 3.5, the latest version of its Mac productivity application with Apple sync capability for iPhone, iPod, BlackBerry, Palm and other handhelds.

Daylite 3.5 is designed to help small and medium-sized businesses at every stage of their business cycle, with features designed for such common business uses as managing prospects and project management.

To protect personal privacy, Daylite 3.5's new syncing abilities allow users to select and sync distinct contact categories (prospects and customers, but not personal contacts, for example).

Additional improvements include the introduction of support for international time zones, the ability to multi-select Daylite-enabled colleagues to set or revise appointments, tasks, projects and opportunities and a new multi-user trash system allows everyone in a workgroup to review or reinstate trashed items no matter who deleted them or how. Exporting now includes tab delimited as well as .csv formats.

Daylite 3.5 also introduces more than 300 contextual help articles using the built-in Apple Help.

"What we've been able to do with Apple's Sync Services is open up a new era of mobile productivity to the multi-user Mac business community," explained Alykhan Jetha, CEO of Marketcircle "With Daylite 3.5 anyone can share business contacts and calendar items – even meetings – between Macs and iPhones or other handheld devices."

Daylite 3.5 users require iSync 2.4 or higher (in Mac OS X 10.4.9 or higher). For BlackBerry devices, they require Missing Sync for BlackBerry 1.0.1 or higher. For Palm devices, they require Missing Sync for Palm 6.0 or higher. For Windows Mobile devices, they require Missing Sync for Windows Mobile 4.0 or higher. See Apple's iSync compatibility page for a complete list of supported devices.

The £99 Daylite 3.5 is available as a free upgrade to existing users. A 30-day demo version is also available.