Bclk - Mobile Platform

The Maker's Pocket Workshop Turn your iPhone into an honest digital caliper and a full workshop toolkit. Place a small object on the screen, drag the two on-screen jaws inward with your thumbs, and read the width to 0.1 mm. Built on real per-device PPI calibration — not a fake ruler picture. WHAT'S INSIDE • Measure tab — A live two-jaw caliper with mm, inch, and fractional-inch readouts. Switch between Outer, Inner, Thickness, and Ring Sizer modes from one dropdown. Per-pixel magnifier, ratcheting haptics, freeze-and-read, big full-screen readout, gauge match chips, and a Recent strip for quick reload. • Tools tab — Nine offline utilities for makers: Unit Converter, Wire Gauge lookup, Drill Bit index, Ring Size Converter, Thread & Tap reference, Material Weight calculator, Circle / Pizza area calculator, Fraction Calculator, and Coin / Battery / SIM Identifier. • Projects tab — Group related measurements into a workspace. Each project has a color, icon, status, notes, and a shopping list. Quick-start templates available. • Library tab — Seven offline reference charts plus how-to guides. • Profile tab — Optional sign-in, themes (Light, Graphite, Brass, Blueprint, System Dark), measurement history with trend view. ACCURACY YOU CAN TRUST The app uses your iPhone's true physical pixel density to convert jaw spacing into real millimeters. Manual calibration available. FEEL OF A REAL TOOL Ratcheting haptics tick every millimeter. Pin a value, set a target with tolerance. PRIVATE BY DEFAULT Measurements live on your device. No ads. No tracking. FREEMIUM, NO SUBSCRIPTION Free forever: the caliper itself, basic themes, projects, and most tools. Workshop Unlock (one-time purchase): Premium tools, extra themes, unlimited history. BUILT FOR Jewelers, woodworkers, 3D-print enthusiasts, and makers.