GCAid is contractor management software in English and Spanish, built for small and mid-size contractors (electricians, plumbers, HVAC, roofers, general contractors and landscapers) who want one app from estimate to paid invoice. Estimates: build from your price list, by voice, or start from a photo and let AI draft it for your review; clients choose options and sign from a link. Jobs and crew: signed estimates become jobs; schedule crew, send appointment reminders and on-my-way notices, and track hours. Work areas with progress photos and short videos. Invoicing with progress billing, payment recording and paid-in-full receipts with your logo. Client portal: clients see progress, photos, documents and invoices from a secure link with no app or password. The app runs in English or Spanish, and each client receives documents in their own language. Online booking widget for your website, plus QuickBooks Online sync. GCAid provides document templates, not legal contracts. Patent Pending.