Solar Installation Mode Panel tilt, roof comparison and educational tilt guidance

Panel Angle Check

Roof vs Panel Angle

Ramp / Accessibility Mode

Vehicle Level Mode RV, caravan, trailer or camper leveling

Tripod / Plumb Mode

Mounting Alignment Antenna, dish or bracket tilt check

Azimuth/elevation targeting for a specific satellite is not calculated here — only relative tilt difference from your entered target.

Ladder Angle Reference

Roof Pitch Reference Chart

Closest standard roof pitch: — (difference —)

Measurement Sessions Stored locally in your browser

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Compare Measurements

Repeatability Test Measure the same surface several times to check consistency

This measures how consistent your own readings are on this device — it is not a certified accuracy test.

180° Verification Bias-compensated two-direction check

Place the device on the same surface and record reading A. Rotate it 180° at the same location and record reading B. Always measure with "uphill" as positive on both.

This technique can help cancel certain systematic zero-offset errors, but it cannot guarantee metrology-grade accuracy.

Advanced Calibration

Calibration compensates for device-specific offsets on this phone. It does not make this device a certified measuring instrument.

Device Setup

Photo-based Measurement Different from sensor-based measurement above

Drag the two endpoints of Line A onto your horizontal reference, and Line B along the sloped edge (e.g. the roof line). The angle between them is calculated instantly.

Photo-based measurement: —

Capture Snapshot