This is two-deck Klondike with Spider build rules. So you can build the tableau in mixed suit but for group moves the cards must match suit. All three variants are free-to-play. No in-app purchases.

3-CARD: unlimited passes through the deck 3 cards at a time.
1-CARD: one pass through the deck 1 card at a time.
RUSH: three passes through the deck, 3, 2 then 1 card at-a-time.