Unusual! A first on the App Store, Free for 7 days. Rate your stress level with your iPhone with a simple, accurate and recognized. Application Stress Test uses all sensors of the iPhone to effectively estimate your general state of stress measuring minute movement disorders and tremors unintentional your muscles, whether rhythmic or arrhythmic, oscillatory, rotary, slow or rapid, localized or generalized, mild or severe, … Other factors that favor these tremors stress: anxiety, stress, fatigue, alcohol, stimulants, heredity, or certain diseases such as Parkinson’s disease.