https://m.livesoccertv.com/ took more than 4 MB. And if you navigate to Sunday's results it took 18.2 MB, which I think is too heavy. I wish there was something light weight like HN.
I'd happily throw something together myself by scraping a collection of different sites, but I suspect the "live" part is what could be tough. I don't imagine there's free live scores API floating around. And even BBC's scores are frequently minutes behind. And I don't think this is the kind of thing I can justify spending money on (unless I plastered ads all over it, defeating the original purpose).