# Foldometer: Fold Angle Gauge — Level, Protractor, Slope Meter > Level, Protractor, Slope Meter (iPhone/iPad app by Matthew Purcell.) - Source: https://appshunter.io/ios/app/foldometer-fold-angle-gauge/id6819503409 (this page in markdown: same URL + `.md`) - Developer: [Matthew Purcell](https://appshunter.io/developer/1844698993) - Category: Utilities, Productivity - Price: $0.99 (on sale, was $1.49) - Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 27.0 · 7 MB - Languages: American English - Released: 2026-10-21 - Data updated: 2026-10-27 - User reviews in markdown: https://appshunter.io/ios/app/foldometer-fold-angle-gauge/id6819503409/reviews.md ## What is Foldometer? Your fold, measured. Open iPhone Duo and Foldometer turns its hinge into a precision instrument. Watch the two halves move on screen as you open and close it, read the exact angle between the displays, and feel a gentle tap when you land on a right angle or lie perfectly flat. It's the most fun way to see what your new foldable can do. Not on a foldable? Foldometer is a beautiful level, protractor, slope meter and camera angle finder for every iPhone and iPad. HINGE (IPHONE DUO) • The live angle between the two displays, from closed to fully open • An animated side view of your device that follows the hinge • Stand presets for Easel, Upright, Video call, Laptop and Reading, or save your own, with a tap when you reach them • Set a zero at any position to measure how far the hinge moves • Record the angle over time, then see a chart with the range and peak speed, and share it as an image or CSV FOLD GAUGE (IPHONE DUO) • Rest one half on a surface and lay the other against a second surface • Foldometer combines the hinge with the motion sensors to read each half's angle from horizontal, even when the first surface isn't level LEVEL • Stand iPhone on an edge to read its tilt, shown to a tenth of a degree • Lay it flat and it becomes a bubble level for any surface • Turn it on its side and the reading keeps counting, with "2.4° from level" right where you need it • Hold iPhone against one surface, tap Set Zero, then rotate to the next to read the angle between them SLOPE AND PITCH • Show any slope in degrees, percent grade, millimetres per metre, inches per foot or roof pitch • Set a target such as a 2% patio fall, a ¼ in/ft waste pipe, a 1:12 ramp or a 6/12 roof, and feel a tap when you hit it CAMERA • Measure angles you can't reach, like a roof line or a leaning post, by lining up arms over the camera view • Slopes read against the true horizon from the motion sensors, even if iPhone is tilted • Freeze the frame to fine-tune PROTRACTOR • Two draggable arms on a full 360° scale, with a tick of haptic feedback for every degree • Tap the reading to flip to the reflex angle PRECISION • Flip calibration: take a reading, turn iPhone around in place, take another. Calibrating on its back also corrects for the camera bump or a case. • Auto-Hold freezes the reading the moment iPhone comes to rest, so you can read it after moving away LOG AND WIDGETS • Save any reading with one tap, add notes like "Garage roof pitch", and export everything as CSV • Home Screen and Lock Screen widgets show your fold angle and newest reading DESIGNED FOR APPLE PLATFORMS • Built for iPhone Duo's displays: toolbars and tabs along the side, and layouts that adapt as you fold • Liquid Glass controls, light and dark appearances, and a layered icon • VoiceOver, Dynamic Type and Reduce Motion support • No account, no ads, no tracking. Camera images are never recorded or stored, and your readings stay on your device. A NOTE ON ACCURACY Readings depend on your device's sensors and how it's held. On iPhone Duo, iOS reports the hinge angle and decides how often it updates. Foldometer is a general measuring tool, not a medical or safety device. ## Chart rankings - #180 in Top Paid · Utilities (US App Store) ## Is Foldometer safe? Not enough ratings yet to assess Foldometer. ## Is Foldometer legit? Foldometer: Fold Angle Gauge appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Foldometer is 65 out of 100 points across 7 verification signals from App Store and developer data. ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/foldometer-fold-angle-gauge/id6819503409/reviews.md ### 5/5 — Super accurate and helpful!! *2026-10-21* Also super cool on iPhone Duo ## Version history (last 1 release) ### 1.0 — 2026-10-21 No release notes. ## More apps by Matthew Purcell - [Percentage Pro - No Ads](https://appshunter.io/ios/app/percentage-pro-no-ads/id6753728496) - [Manifest - Travel Planner](https://appshunter.io/ios/app/manifest-travel-planner/id6812051389) All apps by Matthew Purcell: https://appshunter.io/developer/1844698993 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-27.*