Stephen Downes

Holos, writes Laurens Hof, "continues to be one of the most interesting projects on the fediverse from a technological perspective. The goal of Holos is to run an ActivityPub server on your phone. Because mobile devices are traditionally not particularly suitable for this (changing IP address, not always online), Holos adds a Relay service that mitigates these issues." This post from Holos explains how it's all supposed to work. The major weakness seems to be that "it creates a new form of dependency, where the Relay operator manages your identity." But there are (in my view) plenty of distributed service models that could eliminate this dependency. Here's the Mastodon site for Holos.