I would vouch for Thunder for Android and it has iOS version too. But I don’t think it can override the system font, so it is out of your requirement.

I only know two desktop apps on Linux, both of them are available on Flathub.

• Interstellar
• Lemonade

It looks like only Interstellar is still maintained, Lemonade last update was a year ago.

Love photon. It is quite usabale as PWA too on Android, though I use Thunder instead.

https://cosocial.ca/@evan/112781514769461376

No more issue needs to be triaged as clarified by Evan Prodromou. Bad wording by Johannes Erst.

Remember to be nice to Moshidon devs (and also other free application devs). AFAIK, the lead developer for moshidon is a teenager, they could do with minimal rant in the void. Cheers!

If you like PWA phanpy is nice on mobile or destktop

Just add .rss to their profile