I may be imagining this, but I'm nearly certain I was running dillo on a PDA (I want to say Palm Treo) around 2001. I remember it feeling revolutionary to open up a webpage on something other than my linux desktop computer at the time. Over Wifi!

I hope it survives another 25 years.

Oldest I could find was an Ipaq 3700: https://dillo-browser.github.io/gallery/