You need a deck of physical cards to play Phase 10. NOTE: This app does not provide virtual cards to play Phase 10, it is a tool to help you keep track of scores while playing with the real deck. Discover what it's like to spend less time counting and more time doing what you love - playing games with your family and friends. Ever wish you didn't have to relentlessly search for paper, pencils, and calculators just to keep score of your Phase 10 game? We get it - that's why we created Phase 10 Score Keeper Pro.