@simrob The app is on the Play Store and it's called "Nonograms Katana". There's also a web version at https://nonograms-katana.com/play/

If you install the app or go to the site and navigate to the "Sent by Users" category of puzzles, you can click the "funnel" icon in the top bar and set the filters as follows to see Tattel's puzzles, then click the "Play" button at the bottom to apply the filters.

However, you'd still need to *solve* the puzzles in order to see the solutions in the list, I don't think there's a way to just browse the pictures.