If no target angle has been selected, iLevel can be used to measure angles along the 4 edges oft he phone. Approaching the cardinal angles (0°/90°/180°/270°) a high precision level is faded into the screen to allow for minute adjustments.
Approaching the cardinal angles, an audio signal is generated.
(See audio signal)
With a target angle selected, an additional delta angle relative to the target angle will be displayed in the upper left corner of the display.
The high precision level now references the target angle only.
Approaching the reference angle, an audio signal is generated.
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