Not sure if “CVS receipt layout” is a common term or not, but I’ve used it over the last 10 years or so.
It describes websites that have massive margins with the content displayed as a thin strip down the middle; everything on the side is just wasted space (or crammed with ads).
Receipts from the retailer CVS are a known joke where the smallest, single-item purchase will generate a receipt that’s 6 foot long because of all the ads, coupons, and other junk tacked on.
In the old days, it was a lazy way to make websites work on desktop and mobile. Now, it’s a lazy excuse for not doing responsive design and/or allocating massive amounts of space for ads. I hate it. lol.
There’s lots of good web-based apps. Definitely check out the community gedaliyah linked. I develop one of them, but I’m not here to plug it lol. If you see it and like it, great.
You’re on Lemmy World, and they do offer a few alternative web front-ends. Of the ones they offer, Photon is probably my favorite.
https://photon.lemmy.world/
There’s also an app-directory at https://www.lemmyapps.com/ and you can filter by platform with web apps being a filter option.