The classic, the way you remember it
Klondike is the solitaire that came with every computer, and this is a faithful take on it. A standard deck, seven columns, a stock to draw from, and four foundations to fill. Most of the board starts face-down, so half the fun is figuring out which cards to chase first.
It loads fast, the cards move cleanly, and it works the same on a phone as it does on a laptop. Good for a quick break or a long unwind.