My website, sGradlj.com, but it should count as an app, because almost from day one I maintained it from a bunch of scripts written in fox. The scripts would generate the pages, which I'd then ftp to the site. So while all the pages were (and still are) static, the site itself is probably more dynamic than many.
I started it some time around november 1999, with the initial dozen pages of the "Guide to customs of northamerican tribes on the turn of the centuries". The article dct00001.html was about cigarette lighters, the safety mechanism and the ridiculously long warning sticker; 00002 about nylon bags and the warning that "bag is not edible" and "keep away from reach of children" because some little moron from Nashville almost suffocated by holding head in the bag, who knows how many years ago. The 00003 was about the doors, why they always open outwards on shops and other public buildings, contrary to what we have (so a sure sign to recognize a foreigner is when he tries to push the door to get into a shop). Fourth was about the streets and street types; fifth about advertising, various shapes of. It went all the way to about 550, but was (many years later) accompanied by the symmetrical "guide to life in Serbia for absolute beginners", which was not so rich.
(... 33 words...)
Over the years I kept adding topics, removing some, but the overall design of the pages didn't change much. Just smoothed around the edges, adding jQuery (a very obsolete version by now), specially to solitaire.
Since june 2022 I found out that in the hundred bucks that I pay annually to some Canaders to host this website, I have a two gigabyte space, so I used up some 400M more to host this Byo there, i.e. the link to the site from here is here.
The SF stories was there more or less from the beginning, but the link was bad, or I didn't have both language versions... smoothed that out eventually.