Mastering Precision
Get the most accurate measurements by following these simple steps.
1. Prepare a Card
Grab a standard credit card, ID card, or driver's license. These cards have a universal standard width of 85.60 mm (3.37 inches).
2. Calibrate
Open the settings (gear icon) or click "Calibrate". Place your card on the screen and adjust the box size until it perfectly matches the card.
3. Measure
Drag the ruler around the screen. It snaps to edges for convenience. Use the rotate button for vertical measurements.