File transfer within the Apple ecosystem is very good: AirDrop works flawlessly most of the time. You can drop files to anyone using an iPhone, all you need is physical proximity. I have used it with strangers in the park and at home when sending pictures to family. Picture quality is retained, metadata is also retained (mainly the time at which a picture was captured and location information, if included) The closest equivalent that I know of in the open source world is KDE Connect. KDE Connect is noticeably unreliable. It recently stopped working for iPhones when sending data to Linux, although it still works when sending data to Android. These are minor kinks, probably caused by version differences between the KDE Connect app on the iPhone and the GSConnect extension on Gnome, likely introduced when a product is not as rigorously tested across versions as AirDrop. While looking through the list of Flatpak apps available on the Debian Software store, I came across Magic Wormhole, a protocol that uses a relay server in the middle to allow two peers to discover each other using a single short string, and send files directly to each other. I have not tested this in the real world under various network restrictions, which might make P2P file transfer impossible. I am looking forward to trying it out over the next few days.