If you are just using your phone, FitoTrack or OpenTracks might be the right thing for you. I don't know about the added weight thing though.

Thanks for the tip, I will check it out.

File Explorer

I haven't checked in a while, but I am still using CX File Explorer because I didn't find a FOSS alternative I like. Maybe it is just because I am used to it, but one thing I really like is the network feature that you can access local shares of a NAS.

I am not an excessive note-taking guy, but I am using Notesnook for some time now and it does everything I needed so far.