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About the application:

Crystal Math brings brain training to a whole fresh level. No matter if versus the clock, or versus another math cracks, improve your mental arithmetic on a everyday basis, unblock all achievements one by one and become the fresh math winner. Try you math skills in four challenging modes. Daily Challenge: Solve a fresh challenge every day and war for a spot on the highscore list in three difficulties. Step up your mini game though, you only receive one try! Duel: Challenge another users to a duel, or agree someone's challenge and war for the winnig time. Time Attack: Practice under tournament conditions. You have 30 seconds to solve the challenge. Gratis Mini game: Discover the mini game gratis of pressure and search your private techniques for upcoming challenges. Choose an avatar and present math cracks around the world what you are capable of. What are you waiting for? Pick up your slide rule and receive started! REQUIRED PERMISSIONS: Internet: To access highscores, challenges and submit your times. Read accounts: to personalize you in-app purchases, so they can be restored after re-installation and across multiple devices. Write external storage: To save a screenshot of duels in order to share them with your mates.