excel2: Angles with phyphox To experimentally determine the tilt or inclination angles of an object using our smartphone sensors, the Phyphox app is a very good tool. By utilizing the built-in accelerometer sensor, we can accurately record the gravity components across the Y -axis ( gY ) and Z -axis ( gZ) . Data Table MEASURING ANGLES : The identifier for each individual test or measurement taken. gY : The acceleration value along the Y-axis extracted from the Phyphox app. gZ : The acceleration value along the Z-axis extracted from the Phyphox app. gY/gZ : The mathematical ratio between both components. ARC TANG: The arctangent of the previous ratio (resulting in radians). ANGLE: The final calculated angle converted into sexagesimal degrees. REAL ANGLE : The actual physical angle measured with a manual protractor or analog reference tool. ERROR: The absolute difference between your calculated angle and the real reference angle. %ERROR : The percentage deviation ...