Golf Solitaire 4 in 1, developed by BovioSoft, is a free card game app available for Android 9.0 users. This app features four classic solitaire games in one app: GOLF, TRIPEAKS, PYRAMID, and BLACK HOLE. With high-quality artwork and stylish graphics, this app offers pleasurable music and cool sound effects. The game has 3 difficulty settings: Easy, Normal, and Hard, with specific undo features for each difficulty. The objective of the game is to transfer all the cards from the 7 piles and stock to the waste pile as quickly as possible. The rules are simple, the player can play the bottom card from one of the 7 piles to the waste pile if it follows either an ascending or descending sequence regardless of suit. Aces can be played over Kings and vice versa. The game is over when there are no more cards to be played from the piles or stock. This app is a must-have for all solitaire fans, and instructions for TRIPEAKS, PYRAMID, and BLACK HOLE can be found within the Help section.