I'm very happy with OsmAnd+ on Android. I'm not sure which server(s) are being used by the app when it downloads the map data, but the transfer rate from the s

I'm very happy with OsmAnd+ on Android. I'm not sure which server(s) are being used by the app when it downloads the map data, but the transfer rate from the server leaves much to be desired. It's probably a significant burden to host the entire collection, both in terms of storage space and in available bandwidth. So I can see how hosting the data as a series of torrents would help make this more sustainable. But it's a bit silly to implement an entire torrent stack inside a web browser just to display a few static image tiles...