For free? No, but if you built a native app that needed a backend, you'd still need to host the backend somewhere too. I host my own web apps from a cheap mini pc at home and access them over tailscale for personal use.

As a lark, I built a set of personal productivity apps that are delivered as standalone local webpages. Works surprisingly well on Android, haven't tested on iOS.

Yeah it stands for Progressive Web App - but there are lots of hosting solutions with generous free tiers.

I host a bunch of my own PWAs on Cloudflare using Pages and Workers. It's been free so far.

I host my app on GitHub pages for free. But yes, it's just static which is really all you need with how powerful wasm and JavaScript are.

That's true for most things where you don't need users to share or collaborate on updated data. But if you need so much as a highscore board for your casual javascript game, you need some kind of backend. The parent's assumption that it should be totally free to run arbitrary server code somewhere is mildly ridiculous.

I'm pretty sure that if you build your PWA in a way it works offline through caching (which is easy if it's just a static website), you could host/serve it temporarily and just install it once.