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when you follow somebody, you put their public url in a list, then when you open the app it requests the photos from everybody on the list?

I see no reason why everybody could not run a web server on their phone.

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So if I follow 1000 people,

I make 1000 requests every time I open the app or refresh my feed?

Also not everyone can be on a stable connection with a public IP address with good upload speeds 7/24. In the ideal world: sure. In the real world: impossible (at least for any foreseeable near future).

This has all been solved with ActivityPub or AT Protocol. It's push-based not pull and yes there are still servers. Either you pay for your own server or you mooch on a community server.

Oh, missed that. Then it makes sense, thank you.

Perhaps it could make each request as you scroll? You don't need to see 1000 photos all at once. And if your friend has sketchy internet, perhaps it can push to you when they have a good connection.

It's not perfect, but if we want self hosted, we have to start somewhere and start working out the problems.

That would require javascript, and the set of people interested in self-hosting and the set of people willing to touch javascript with asbestos gloves and a ten foot pole do not intersect.

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