@IzzyOnDroid Thanks, will check them out. I should say that I've been using https://mattbrown.com/blog/20260604-c2k-on-fdroid/ (well beyond finishing the initial couch 2 5k) and it's pretty great for what it does. Just now looking or something more generalized.
@johns in that case, you might wish to check FitoTrack first, it covers a lot of activities it seems. More alternatives can be found in my app list for Fitness apps: https://android.izzysoft.de/applists/category/named/sport_fitness (but that also contains non-free candidates from PlayStore – easy to skip them, though, by focusing on the icons pointing to F-Droid and IzzyOnDroid 😉).
@johns I use #FitoTrack for cycling. It supports running, walking and other types of exercise. I highly recommend it! https://codeberg.org/jannis/FitoTrack
@johns not using any myself, but in the past I've heard people recommending RunnerUp (https://f-droid.org/packages/org.runnerup.free). FitoTrack (https://f-droid.org/packages/de.tadris.fitness) might work as well, also heard it mentioned here and there.