FoldLab - Hinge & Fold Tools

Put useful angles within reach. FoldLab turns the physical hinge in iPhone Duo into an angle and reference toolkit. Other iPhones can use the free bubble level without a purchase.

FREE TO USE • Live hinge angles on supported iPhone Duo hardware • On iPhone Duo, hold a hinge reading while you reposition the device • A free bubble level for one device plane on other iPhones too • On iPhone Duo, clearly labeled demo mode with manual angle and tilt controls

FOLDLAB PRO FOR IPHONE DUO — ONE-TIME PURCHASE • Symmetric miter, slope and pitch tools • Relative angles, repeat targets and physical templates • Camera-panel elevation and personal joint-angle observations • Custom targets with haptic and optional audio guidance • Save readings from any tool, plus named presets and opening traces • Before/after records with optional reference photos • Calibration against a separate known-angle reference

MADE FOR THE FOLD The workbench adapts to compact, portrait and wide layouts. On supported hardware, an outer-display companion keeps the current reading in view when the system makes that display available.

YOUR RECORDS, ON YOUR DEVICE No account, advertising or analytics. Measurements and photo copies are stored locally; iOS backups may include app data according to your settings. Live and demo libraries stay separate.

REQUIREMENTS AND LIMITS Requires iOS 27.0 or later for the free bubble level. Live hinge measurements, advanced tools, demo mode and FoldLab Pro require iPhone Duo with iOS 27.1 or later. Other iPhones display a hardware requirement message and provide the free bubble level without Pro offers. The app targets iPhone; iPads running it in iPhone compatibility mode receive the same limited experience. Advanced tools require Pro, including in demo mode.

Readings can differ from the true angle by up to 5°, and displayed decimal places do not establish accuracy. Use a dedicated instrument when precision matters. Joint-angle readings are personal observations, not medical assessments. Hinge observations are not a mechanical health certification. Opening counts reflect only activity observed while the app is active. Never force the hinge.

Discovery signals