PSA: Have you heard the good word about Progressive Web Apps?
Like a web app, nothing to install. Lives in your browser tab. Cannot install toolbars or viruses or malware outside the tab.
Like a native app, you own your data. It lives in your browser tab.
Like a native app, can be completely offline. Just host it on a server somewhere as static files, load it in a browser tab. Now you have it cached on your machine, it won't expire.
The only caveat: it _can_ exfiltrate your data in the browser tab. Go forth and share small PWAs with no dependencies that are easy to inspect with eyeballs.
(People who know more, please correct/educate me. I have been utterly oblivious because every PWA I've ever seen has been the lousy kind: some Principal Agent trying to insinuate themselves into your habits, constantly call back to their servers, keep their grubby paws in your data, using a bazillion dependencies to guarantee they lose control of their supply chain and your data. Please also share all the good PWAs I have somehow never encountered.)
@akkartik
a really good pwa: https://tiddly.packett.cool/
my kids attend the kumon extracurricular math/reading program and their stylus-on-tablet "app" is quietly a pwa, not some horrible native android/ios thing. was surprised to see that
TiddlyPWA — TiddlyWiki Storage & Sync Solution