pico

 Pico  is an Android client for Micro.blog with support for Micropub.

Development for Pico was done on GitHub.

The app allowed one to
 * Create a new post including text and/or an image
 * View your timeline
 * Open the conversation view for a single post
 * Reply to a post from the timeline

Belle B. Cooper announced the project on 2018-08-31.

has indicated that it "Probably wouldn’t be a big stretch for an Android developer to update Pico since it’s already using Micropub, just currently hardcoded to Micro.blog’s endpoint."

Disambiguation
There are other projects with the Pico name:
 * pico is the PIne COmposer, a text editor that ships with many Unix systems.