The plan is to provide a general-purpose search engine powered by Google, and then build our own category-specific search engines which will yield much better results thanks to filters.
It's currently written in Vue.js but I'm planning to rewrite it in React/Next.js + TailwindCSS. I would love to team up with people on HN if anybody is interested.
Or build a website that matches charities with benevolent developers. Oh wait that exists:
Unless you’re looking to share location with others as you run - in which case your request makes sense.
Would OwnTracks meet your requirements? https://owntracks.org/
As to why not buy a running watch: I already have a smartphone.
OwnTracks seems to cover my use case, but has a lot of unnecessary features built in. I can probably use that.