FOR IMMEDIATE RELEASE

MARK/SPACE ANNOUNCES THE MISSING SYNC FOR WINDOWS MOBILE

Now with Support for Entourage and Windows Mobile Smartphones

LOS GATOS, Calif.--April 5, 2005--Mark/Space, Inc. today announced The
Missing Sync(TM) for Windows Mobile, a substantial update to The Missing
Sync for Pocket PC, synchronization software that connects Pocket PCs and
Windows Mobile Smartphones to computers running Mac OS X.

The Missing Sync for Windows Mobile offers several desirable features over
its predecessor, including contacts and calendar synchronization with
Microsoft Entourage 2004 and support for Windows Mobile Smartphone devices,
such as the Audiovox SMT5600/Orange SPV C500, i-MateSP3i and Motorola
MPx220.

"We have our customers to thank for this release," stated Brian Hall,
company president and CEO. "The Missing Sync for Windows Mobile was
designed with the most asked-for features and support for the latest
smartphone devices, then made more functional with a striking new interface
that will be appreciated by existing and new users alike."

The Missing Sync for Windows Mobile adds Microsoft Entourage
synchronization alongside its support for Mac OS X's Address Book and iCal
applications. Other new features include SyncMinder(TM) to tell the user
when it's time to sync, at-a-glance status that shows useful information
about a connected device, handheld clock synchronization and user-created
profiles that allow specific sync features to be turned on or off. Earlier
favorites are of course still present: Bluetooth and Wi-Fi connectivity,
iPhoto and iTunes integration and the ability to mount the Windows Mobile
device like a disk on the Mac OS X Desktop.

In addition to new features, The Missing Sync for Windows Mobile has at its
core a new plugin architecture that gives third-party developers the
ability to create sync plugins for their own applications. "Now, Mac
developers can easily add support for Windows Mobile Pocket PC and
Smartphone devices to their Mac applications," said Ken Freeman,
Mark/Space's director of product management. "To help increase the use of
Windows Mobile devices in the Mac market, we're working with developers to
grow the number of Mac-friendly applications that can synchronize
information with these devices."

Mark/Space has also improved the method by which data is synchronized to
the handheld device. The Missing Sync for Windows Mobile now employs
Microsoft's Pocket Outlook Object Model (POOM) to manipulate information on
the handheld in the same way that Windows ActiveSync does. Advantages to
using this method are increased sync performance and the ability to sync a
Windows Mobile device between a Windows PC and a Mac.

PRICING, UPGRADES AND AVAILABILITY
The Missing Sync for Windows Mobile is expected to be available for
download from the Mark/Space Online Store before the end of June. The
electronic download will be priced at $39.95; retail packaged CD's will be
available this summer for $49.95.

Free upgrades will be made available to all customers who purchased The
Missing Sync for Pocket PC on or after April 1, 2005, while owners of any
previous Missing Sync product, regardless of platform, will be able to take
advantage of a special 50%-off upgrade price when the software ships.

For additional information on features, upgrades and system requirements,
please visit http://www.markspace.com/missingsync_windowsmobile.html.

ABOUT MARK/SPACE, INC.
Founded in 1990, Mark/Space, Inc., www.markspace.com, develops and markets
mobile and wireless software, including the award-winning Missing Sync
products that connect a Mac OS computer to handheld devices from Dell,
Garmin, HP, palmOne, Samsung, Sony and others.