Solitaires.gg – Free ad-free solitaire in the browser

Plays immediately with no sign-up, no pre-roll ads, and an installable PWA that saves locally — exactly what you want for a no-fuss solitaire session. The UI exposes useful features (undo, hint, daily puzzles, stats) and adapts across devices, but it's essentially a clean, competent take on an old category rather than a novel product.