This update sharpens the interface: the iPad layout now uses a centered, comfortable reading width instead of stretching edge to edge, plus small display fixes. iPhone is unchanged.

MagStud Pro 2.0 — a pro upgrade for the magnetometer toolkit, still 100% offline. New Pro Hub gathers everything: • Figure-8 calibration with hard-iron baseline zeroing for cleaner reads. • Stud center & width: edge-pair detection finds the true middle of a stud, not just an edge. • On-center spacing assistant: mark a stud and it projects every stud across the wall at 16" or 24", with on-layout / off-layout grading. • Bubble level & plumb from the accelerometer for straight mounting marks. • 60 Hz AC field analyzer with a live FFT spectrum (vDSP) to spot live wires. • Compass (magnetic + true), relative depth meter, and scan-session logging with a PDF report. • Named sensitivity profiles (Surface, Standard, Deep Wall, Maximum) that retune every detector at once. Sensor math kept honest. No account, no network — everything stays on your device.

MagStud Pro - What's New Version 1.3 Stud Sketch (new Pro tool) - after marking stud peaks during a scan, open Stud Sketch to see a scale wall diagram with every stud center labeled in inches from the wall's left edge. Gap distances between studs are annotated automatically. Tap Render to export a crisp PNG you can share with a contractor, save to Files, or print - exactly the document you need when mounting a TV, running shelves, or planning a renovation. Heatmap PNG Export - the Wall Heatmap tab now has a Save Map button. One tap renders the full 128 grid as a 1200 900 px PNG with each cell's peak µT value printed inside, plus the session peak and hot-cell count. Share it with the same iOS share sheet as the rest of the app. Version 1.2 Framing Reference - an offline IRC 2024 guide to wall framing standards (16, 19.2, 24, and 12 in. o.c.), actual lumber dimensions, joist spacings, and safety notes. Includes a Stud Spacing Calculator: enter any two confirmed stud positions and total wall width to project every stud center across the wall. PDF Session Export - open any saved scan in the Journal and tap "Export PDF Report" to share a formatted document with session details and the full detections table. Bug fix - detections marked with the Sweep MARK button are now saved to the journal immediately. Previously they were lost when switching tabs. Version 1.0 - Five detection modes: Sweep, Wall Heatmap, AC Detector, Joist Spacing, Calibration. - Real magnetometer math via CoreMotion - magnitude in microtesla with an edge-isolating high-pass filter. - Wall Heatmap: a 128 grid that paints itself as you pan the phone across the wall. - AC Detector: narrow-band Goertzel filter for 50/60 Hz live-wire hum. - Joist Spacing tool with snap-to-standard 16" / 19.2" / 24" projection. - Three-second ambient calibration that subtracts your local field offset from every reading. - SwiftData Journal of past scans with photo and notes. - Configurable haptic and audio peak cues. - Local-first: no account and no analytics.

MagStud Pro 1.2 adds an offline Framing Reference (IRC 2024 stud spacing standards, lumber dimensions, joist spacings, safety notes) with a Stud Spacing Calculator that projects every stud center from two known positions, plus PDF export of any saved scan. Fixed a bug where marked detections could be lost when switching tabs. Fully offline — no account, no tracking.

Updated premium app icon and refreshed the App Store build.