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Simple small program contains a (Illuminometer),(Level),(Compass) and (Angle).
(Illuminometer):International standard unit: lux. You can choose the place to judge whether to exceed the recommended standard value
(Level):Show two axes at the same time. The tilt angle displayed on the higher side(unit: degrees)
(Compass):The phone must be placed horizontally.Can be Northern Correction.
(Angle):Through the camera to simple measurement.