Interesting that this movie bears no relation at all to the Stephen King short story of the same title on which it claimed to be based.
(In the short story, the titular lawnmower man is a faun-likely creature, working for the god Pan, who literally eats the lawn's grass with his own mouth)
It keeps your traces local until you choose to share them. Uploading GPS traces helps with quality control in terms of road speeds and discovering trails.
There are a few OSM apps that make it easy to share tracks. I use OsmAnd, it allows easy recording, viewing, and uploading to OSM. OSMTracker probably has better battery life, maybe.
Take reveal.js to the next level with markdeck. It a dockerfied version of reveal using markdown and graphics generated on the fly with asciitosvg and graphviz.
https://github.com/arnehilmann/markdeck