SiteSpec
For engineers and architects visiting job sites, SiteSpec turns iPad sketches and measurements into material takeoffs, supplier-ready RFQs, and code compliance checklists before they leave the trailer.
civil engineers and architects running jobs from the field
- Sketch-to-takeoff: AI extracts linear/area counts and maps them to standard material SKUs
- One-click RFQ emails drafted to local suppliers with measured quantities auto-filled
- Offline-first site mode that syncs once back in coverage
- Code-check overlays for fire egress, ADA, and structural minimums flagged against the sketch
Field work is the exact situation iPad CAD (PixyCAD-class apps) is pitched for, but no mainstream app turns a sidewalk sketch into a quote before the site visit ends.
Multiple established takeoff apps with real traction: STACK (now on iPad), Houzz Pro, Bluebeam Revu, and ArcSite (21,000+ reviews, 21M+ drawings/takeoffs created) confirm sustained demand for sketch/plan-to-takeoff workflows among construction professionals.Best Takeoff Apps for iPad of 2026 - Reviews & Comparison ↗Easy-to-use Mobile CAD - Construction Estimating, Takeoffs, Proposals | ArcSite ↗
ArcSite already does almost exactly this — sketch on iPad → auto-calculate materials → takeoff → estimate → branded proposal, with explicit verticals for Architecture & Design and Engineering; STACK is now iPad-native and Bluebeam Revu is entrenched for markup/takeoff.Easy-to-use Mobile CAD - Construction Estimating, Takeoffs, Proposals | ArcSite ↗Take STACK to the Field - Takeoff & Estimate Now Works on iPad ↗
Willingness to pay is demonstrated by tiered paid plans (STACK starts free then paid tiers, ArcSite sells Business/Enterprise demos) and per-seat construction software norms; however, ArcSite/Houzz Pro/STACK compete on price, compressing margins for a new entrant.Construction Software Cost & Pricing | STACK Pricing Options ↗STACK Pricing (2026) ↗
Construction estimating/takeoff software has been a durable category for decades (Bluebeam, PlanSwift, STACK) and field-to-office digitization is a long-running trend, though specific tools face disruption from AI vision and AR scanning.Best Architecture Apps for iPad: Top 10 Apps for Architects ↗
Building this requires a mobile CAD engine, scale/measurement inference from sketches, a maintained material/cost database, RFQ templates, and code-compliance checklists — all individually doable but nontrivial to assemble into a polished, accurate product; ArcSite's existence proves it's buildable.Easy-to-use Mobile CAD - Construction Estimating, Takeoffs, Proposals | ArcSite ↗