The portable version of EssentialPIM can be run directly from a USB drive so you can take your appointments, tasks and notes with you when you travel. All of your settings are stored on the USB providing a consistent user experience no matter which computer you are using the software on. All of the data you work with is encrypted and remain only on the USB drive so there is no danger of leaving personal information on someone else's machine - however, it is possible to configure folders on your home computer which can then be used for backup purposes and storing temporary files.

Two version of the portable edition of EssentialPIM are available Free and Pro. The Pro version adds the ability to automatically run the program when the USB drive it is stored on is connected to computer and *.epim files can be automatically associated with Portable EssentialPIM. With the Pro edition, you can create shortcuts to Portable EPIM from within the program on any computer. If you find that you regularly work with more than one computer, working with portable provides a quick and easy way to ensure that you have access to the same information wherever you may be, and you do not need to compromise on features.

Build 6.54 (changelog):

Improved: Synchronization with Google Calendar. Google Calendar colors will now be synchronized, many sync inconsistencies were fixed, as well
Improved: Synchronization with Google Drive (notes will now be created in the Drive’s native format for better compatibility)
Improved: Mail signature adjustment when changing mail accounts and message format (rich text HTML or plain text)
Improved: Export of contacts into vCard (*.vcf) file format, especially when exporting different contacts with similar names
Improved: CardDAV synchronization of contacts with OwnCloud 7.0 server
Fixed: Issue with inability to drag and drop text when composing mail messages
Fixed: Click on the new mail icon in the system tray
Fixed: Incorrectly working hyperlinks in between EssentialPIM items created in older EPIM versions
Fixed: Outlook synchronization of recurring events with some sophisticated recurrence patterns
Fixed: Notes not being always shown in Related Items tab
Fixed: Copy format feature in Notes
Fixed: Couple of minor problems related to the request read receipt feature in Mail
Fixed: Other minor bugs found since last version

Verdict

A great tool for workers who need to travel, the portable version of EssenitalPIM has few differences from its desktop counterpart