Vectra Site

Vectra Site is a completely free, ad-free offline construction math toolkit for contractors, site supervisors, architects, engineers, and construction students. No internet required. Every calculation runs locally on your iPhone. We never collect personal data. • Concrete, mortar, aggregate & paving estimates • Board-foot lumber calculations (North American sizes) • Roof pitch, rafters, stairs & stud wall layout • Excavation & cut/fill balance • 3-4-5 square layout • Imperial / metric switching • Calculation history & custom presets • Dark / light mode Important: All results are estimates for planning only and do not replace designs by a licensed structural engineer. Follow local building codes. No ads, no in-app purchases, no subscriptions. Forever free.