Because it single-handedly solves the problem of unifying contact and calendar information across devices and programs, iSync is an ideal tool for the modern mobile worker. With one click, a Mac user can update Palm, iPod, iDisk, and Apple Address Book records. The software can even sync Macs connected to the same paid .Mac account and, when run on a Mac with Bluetooth, can sync Bluetooth-enabled phones.

Although the idea is excellent, the execution, so far, leaves something to be desired. In testing, we synchronized contact and calendar information with iDisk (the .Mac online address book), an iPod, and a Sony Ericsson T68i cell phone. Syncs regularly took over an hour to perform. Even when run back-to-back with no new information added, they took the same amount of time. This might be because of the large volume of calendar information we were trying to sync (user forum responses suggest that slow syncing is rare), but it still shows a lack of robustness in the program. Also, iSync can connect with Palm devices but won't sync with the Palm Desktop software. That leaves those who prefer the Palm Desktop to Apple's inferior iCal in the lurch.