The Mission-Critical Construction Snagging & Digital Blackboard System
Engineered specifically for semiconductor fabs, cleanrooms, and mission-critical jobsites. 100% offline on-device architecture, 1000% vector CAD zoom, column grid auto-snapping, local speech AI, and regulatory digital blackboard photos.
100% Offline Air-Gapped Architecture · Zero Cloud Egress
Zero cloud API calls, zero analytics trackers, zero external servers. All drawings, photos, voice transcripts, and punch records remain encrypted inside Apple's local sandbox on your device. Verified for TSMC fabs, semiconductor cleanrooms, defense, and high-security industrial facilities.
Engineered for High-Tech & Mission-Critical Jobsites
Revolutionizing field audit efficiency through five core technological pillars
Zero Cloud Egress Guarantee
Complete air-gapped security. No remote servers, no cloud telemetry, no account login. Blueprints and photos never leave your device.
1000% Vector CAD Lossless Zoom
Powered by native PDFKit vector rendering. Zoom in up to 1000% to inspect micro-valves, ductwork, and conduit line numbers with sub-millimeter clarity.
Column Grid Auto-Snap Algorithm
Tap anywhere on the drawing. The geometric engine instantly snaps to the nearest column gridlines (e.g., Grid P22-P23 / RB-RC) automatically.
On-Device Speech AI Structuring
Dictate hands-free while walking the jobsite. WhisperKit & Core ML transcribe and extract defect discipline, subcontractor, and due date locally in real time.
Regulatory Digital Blackboard
Site photos automatically burn a permanent regulatory blackboard with project name, column coordinates, inspection items, and tamper-proof SHA-256 stamp.
One-Tap Official Audit PDF
Export official audit reports locally with blueprint thumbnail indexes and watermarked photos. Share immediately via AirDrop or local export.
🌍 Multi-Jurisdiction Regulatory Presets & Blackboard Standards
Minimalist Field Workflow: From Blueprint to Sign-off in 5 Steps
Eliminate cumbersome paperwork and disorganized photo sorting forever
Create Custom Project & Import Vector Blueprints
Set up your specific project and jobsite with a clean workspace (zero leftover sample data). Supports single or multi-sheet CAD vector PDFs, or blueprint-free coordinate grid mode.
Tap to Pin · Automatic Column Grid Snapping
Tap directly on the defect location. A snag pin is created instantly, with the geometric algorithm calculating nearest column axis coordinates (e.g. Grid P22-P23 / RB-RC).
Hands-Free Voice Dictation · On-Device AI Structuring
Speak naturally on site: "Firestopping sealant thickness between columns P22-P23 is inadequate. Critical defect, notify Tatung Fire Engineering to rectify by Friday." Core ML structures it instantly.
Snap Inspection Photo · Auto-Burn Digital Blackboard
Capture the photo directly in the app. A permanent, regulatory-compliant digital blackboard with project metadata, coordinates, and timestamp is permanently burnt into the pixels.
One-Tap Audit PDF Report · Instant Local Delivery
Tap "Export Official PDF" to generate a professional audit report with blueprint locator thumbnails, photos, and sign-off lines. Transfer instantly via AirDrop.
Frequently Asked Questions & Technical Support
Everything you need to know about security, blueprints, and data integrity
How does GridSnag guarantee zero data egress?
GridSnag is built strictly with zero network entitlements and zero external network calls. All drawings, photos, voice models, and punch items are stored within Apple's local encrypted sandbox. You can verify this by running the app in Airplane Mode or using network monitoring tools.
What blueprint formats are supported?
GridSnag supports vector and raster PDF blueprints exported directly from AutoCAD, Revit, ArchiCAD, and MicroStation. Vector blueprints support up to 1000% lossless zoom. Furthermore, you can use the built-in Interactive Structural Grid mode without any blueprint files.
Does GridSnag require an account or subscription?
No account, registration, or subscription is required. Download once and use it permanently across iPhone, iPad, and Mac under Apple's Universal Purchase.
How do I get customer support or report an issue?
You can reach our engineering team directly at howly7777777@gmail.com or open an issue on our GitHub repository. We respond within 24 hours.