The question doesn’t even make sense. You have to redefine it to “purpose” or some other word to even get started. The only literal interpretation is “what does ‘life’ mean?”, which is just something like “a metabolic system capable of Darwinian evolution”.

Oruxmaps is pretty good too.

I’m not sure this is going to help your mental state, but the word is “worst”. A is worse than B, but C is the worst of all.

OruxMaps is an awesome alternative to Google maps. It does require some configuration to get Google imagery working since they were required to remove it, but there’s also a huge variety of other online sources it can use (wmts etc), plus off-line maps, overlays. You can use your own maps from qgis or other gis software, and there’s multiple navigation options. Tracks, routes, way points, and so much more.