PhotoBackup is a set of mobile and server applications to free the photos you take with your mobile devices and keep them on your own server, at home.
Yes, it is a kind of self-hosting! You can also call it home-clouding, but I'm not sure the term really exists (yet).
Because only YOU should access YOUR photos! Do not let Facebook/Google/Apple/any-other-company keep your pictures on their servers, as you don't know how and what they use them for. PhotoBackup is here to help you in the process.
The easy part is to install a mobile application and use it. Currently, only Android is supported, but hopefully more systems will be in the future.
The slightly trickier part is to install a server application on your server, ideally at your home. Several implementations are available, in Python, Perl, NodeJS, Go and PHP at this moment. More will probably come in the future.
You're right, the future will be full of new stuff ;-) This is just the beginning.
More server implementations will be available in the future. Noticeably, we think of a Cozy Cloud application and some applications for TV-STB like Freebox, Live box, etc.