Foldmeter: Hinge Angle & Ruler
Turns iPhone into a ruler, protractor, level and diameter gauge, and iPhone Duo into a live folding rule.
appRabauken GbR · Utilities · $0.99
iPhone screenshots
How it uses iPhone Duo
Foldmeter turns your iPhone into a measuring tool – and your iPhone Duo into a folding rule: unfold it and the app
App Store descriptionWritten by the developer.
Foldmeter turns your iPhone into a measuring tool – and your iPhone Duo into a folding rule: unfold it and the app shows its angle to the degree, live as you fold. ON EVERY IPHONE • Ruler: Centimeters or inches along both screen edges. • Diameter: Lay a screw or drill bit on the screen, drag the lines to its edges, read the size – with a hint for the matching thread size (e.g. M6 or 1/4″). • Protractor: Place an object on the screen, drag the arms to its edges, read the angle. • Level: Upright for shelves and picture frames, flat as a bubble level for tables and surfaces. ON IPHONE DUO • Hinge angle: Your Duo's angle in large digits, with a side view of the device. • Hold values: Keep up to three readings and compare them. • Ruler and diameter on both the inner and the outer display. PRIVACY No ads, no tracking, no account. All readings stay on your device.
Foldmeter: Hinge Angle & Ruler on iPhone Duo: FAQ
Is Foldmeter: Hinge Angle & Ruler optimized for iPhone Duo?
Yes. Foldmeter: Hinge Angle & Ruler is Built for Duo: it uses the fold, Split View or the outer display. Verified on October 25, 2026 (App Store text).
What does Foldmeter: Hinge Angle & Ruler look like on iPhone Duo?
Foldmeter turns your iPhone into a measuring tool – and your iPhone Duo into a folding rule: unfold it and the app
How much does Foldmeter: Hinge Angle & Ruler cost?
Foldmeter: Hinge Angle & Ruler costs $0.99 on the App Store.
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