While working at Pillar Project, I initiated an extensive user research and testing program.


We don't know who the user is, and we are not validating our designs early enough.



I built a full "user testing lab" from scratch. I evolved a series of personas out of this research, which were used by all departments. Valuable insights were gleaned, which led to direct changes in the app.

I wrote about how to conduct mobile user testing for UX Collective here

(I think it's the best guide written on the topic...)

I wrote about cryptocurrency personas for UX Collective here.

Cryptocurrency Personas (single page infographic)

cryptocurrency personas


In order to validate our designs, I bought test phones and built special camera sleds for them. I eventually trained a small team of colleagues how to use the equipment, wrote interview scripts, and conducted multiple user test sessions at a week-long conference. 

Building a Test Phone

I am quite proud to have engineered a usability testing sled for a growing startup. After fine-tuning the setup and testing with dozens of users, I wrote up everything I had learned for This covers equipment, software, and interview technique.

My case study on mobile user testing was published by UX Collective

Here is a brief gallery, showing how the rig was built and used.

I've also included two videos, in which I talk about testing the Pillar Wallet.

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© 2020 Jon Crabb