Design Talk 42. Psion revisited in the Gemini PDA? Martin Riddiford, Therefore Design and Davide Guidi, Planet Computers

The Gemini PDA by Planet Computers brings a much loved form factor back to the world of smartphones – the clamshell, keyboard-based palmtop. In this episode, MEX founder Marek Pawlowski talks to Martin Riddiford of Therefore Design and Davide Guidi, CTO of Planet Computers, and hears the story of Gemini’s development and successful crowdfunding campaign. It is a tale which traces its roots back over two decades, to the days when British computing pioneer Psion was at the forefront of mobile innovation. The conversation explores how Martin’s design work on those Psion devices informed today’s rebirth as the Gemini PDA and looks at the design challenges Planet has overcome to bring this new product to market. Lots of bonus photos in the show notes. Get in touch with feedback and questions @mexfeed on Twitter or email designtalk@mobileuserexperience.com.

Listen via

On this edition

Martin Riddiford (left) and Davide Guidi (right) showing pre-production models of the Gemini, alongside the Psion Series 5MX, at Therefore’s design studio in London


More photos

Gemini PDA (pre-production) showing the custom agenda app and menu bar


Gemini PDA (pre-production) running Excel in landscape format and showing the custom menu bar


Gemini PDA (pre-production – right) next to the Psion Series 5MX (left)


Gemini PDA (pre-production) running Firefox within a Linux shell hosted on Android


About MEX Design Talk & how to get in touch

The podcast for the MEX community, interviewing UX pioneers, exploring emerging technologies, user behaviour and how to design better digital experiences.


  • Jukedeck, for the artificial intelligence engine which provided the music
Categories: Podcast
Tags: androidgemini pdaindustrial designkeyboard phoneslinuxmobile user experiencepalmtopplanet computersproduct designpsionsmartphonestherefore designuser experienceux
" Marek Pawlowski : Marek Pawlowski is the founder of MEX. Since 1995, he has focused the MEX business on helping digital industries to develop better, more profitable products through improved understanding of user behaviour with mobile devices and wireless networks. MEX is best known for its events, research and consulting, which balance commercial, technical and user insights to define the future of mobile user experience.."

View Comments (2)