Easily measure tilt angles with this free protractor app. It displays inclination from 0 to 359 degrees, along with gradient percentages and angles summing to 180 or 360 degrees. Switch to theodolite mode to set a specified angle to zero.
20260810
August 11, 2026
User interface improved.
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This app functions as a free tilt angle protractor. It allows you to measure inclination angles from 0 to 359 degrees simply by tilting your device. It also displays the converted gradient percentage and angles that sum to 180 or 360 degrees simultaneously.
Key features include measuring tilt angles from 0 to 359 degrees, displaying the gradient percentage, showing angles that sum to 180 or 360 degrees, and a theodolite mode where you can set a specified angle to zero.
Yes, the Angle Gradient Inclinometer is a free application. However, it does display advertisements to support its development and availability.
The app displays the converted gradient percentage alongside the angle measurement. For example, it notes that 45 degrees is equivalent to 100% gradient.
Theodolite mode allows you to set a specific angle measurement to zero. This can be useful for establishing a baseline or reference point for subsequent measurements.
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