Whereas versions of this software for other mobile platforms concentrates mostly on synchronization, the edition for the iPhone is a little different—in that it is also a means to help iPhone users migrate from another smartphone or handheld to an iPhone.

A migration assistant(see image below) guides users through the process of getting the contacts, calendar entries and phone camera photos from their Palm OS, Windows Mobile or BlackBerry device onto their iPhone. The whole process takes only a few minutes, according to Mark/Space.

On the synchronization/backup front, the software also allows you to move your SMS messages, call logs and notes data off the iPhone and onto your Mac for the first time.

So, for example, users can view and search the SMS messages in a threaded view on their Mac, just like on the iPhone.

Syncing the call log means users can browse new contact numbers and add the useful ones to the Address Book on the Mac. It also means that incoming, outgoing and missed calls are logged.

The Missing Sync syncs iPhone notes so you can read them in Microsoft Entourage, Yojimbo from Bare Bones Software, or Mark/Space's own Notebook application, which comes as part of the package.

The Missing Sync for iPhone goes for $39.95 new and $24.95 if you're crossgrading from a version for another mobile platform, such as the Palm OS or Windows Mobile.

Mark/Space says it is working on a Windows version of The Missing Sync for iPhone.