Take a look at the podman kube play command which lets you run K8s-style stack definitions on podman. Has partly replaced compose for me (although I still have some docker servers running for stacks that don’t play nicely with podman yet).

Probably not what OP is looking for.

But I’m also happy with my Garmin Instinct. I use it disconnected from my phone, it does everything I need offline and stand-alone. To add tracks for navigation I just connect it to my linux laptop and drop the GPX file into the NewFiles (or whatever it’s called) folder on the watch. I was surprised how well it works without official apps. The only thing I used the app for was to update the firmware when I bought the watch.

Also, fittrackee looks promising - thanks for the tip!

I would second that. I currently use nix besides Flatpaks for development environments but also find it somewhat overcomplicated. Looking forward to give toolbx a try.

0ad, warmux