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STAY CALM: Or things get harder.Using advanced biofeedback algorithms tied to your Apple Watch through the HealthKit framework, CardioCrack monitors your stress level and fights back if you lose control. Experience a classic game with an addicting twist, and unlock the technology in your Apple Watch in a revolutionary new way. Learning to master your stress response via cardiofeedback will allow you to take mind-body control to a whole new level. Imagine better mastery of migraines, stress, and anxiety in ways that have been out of reach until now. Time to show you what the Apple Watch is capable of...