Urlaub on Nostr: I'm searching open source solutions to replace Strava, Komoot, and Garmin Connect ...

I'm searching open source solutions to replace Strava, Komoot, and Garmin Connect like apps.
So far, I found this app on zap.store (nprofile…tdq0), looks promising: https://opentracksapp.com

But it needs OSM Dashboard for OpenTracks to be installed and as well Gadgetbridge to connect with a Garmin device, both not on zapstore?

Anyway, what are your favorite open source apps and solutions to replace outdoor and fitness apps?