Why does it have to be a web app? It does not meet your requirements, but when I looked into this sort of task before, the best option looked like Gramps [0], which was discussed at [1].

  [0] https://gramps-project.org.

- Source: Hacker News / 8 months ago

Is there a reason to prefer Webtrees over an open source desktop app like Gramps? https://gramps-project.org/. - Source: Hacker News / 11 months ago

My technique is to maintain my tree off line in Gramps and do online work in the always free FamilySearch. Source: over 1 year ago

Alternatively, there's Gramps (free): https://gramps-project.org/. Source: over 1 year ago

I think you are looking for Gramps. Source: over 1 year ago

I don’t know if it technically counts, but I use https://radiooooo.com. Source: 6 months ago

Check out Radiooooo it’s like pandora but you choose a country, a decade, and a vibe (slow/fast/weird). Source: 11 months ago

Oh wait, there’s another app for that called radioooo you can select a country and a decade. I’d try Nigeria in the 80’s, Zaire in the 70’s and 80’s and Ghana around then too. Oh and South Africa as well, though that will be more horns and electrics. Source: 12 months ago

Hey y'all, I usually dig around for random obscure stuff in second hand record stores, but recently have been using radiooooo.com to give me a random track from a country and decade of my choice. it's awesome so far and I've found some really cool stuff, but I was wondering if there are any other services or apps people in here use to find obscure music. Source: about 1 year ago

In the same spirit you have radiooooo where you can chose a country + a time period and you get a nice playlist. I've Discovered Amazing song on it. Source: about 1 year ago