Built for the people who fix what breaks.

The residential trades — HVAC, plumbing, electrical — are a $500B+ industry running largely on clipboards, group texts, and spreadsheets. The software solutions that exist were designed for office workers: complex UI, English-only, cloud-dependent, and priced for enterprise procurement.

The Phoenix metro area alone has thousands of residential HVAC contractors, many of them small owner-operated businesses with bilingual teams. They need tools that work the way they work — fast, offline-capable, bilingual, and built around their actual job: diagnosing systems, writing estimates, booking callbacks.

The specific problems: estimates written in the field get lost before follow-up; crews switch between English and Spanish mid-conversation but tools don't; technicians need diagnostic guidance without slow jobsite connections; callbacks fall through without a lightweight CRM a field tech will actually use.

Bilingual from day one: not a translation layer bolted on later. Every UI element, every AI response, every notification authored in both English and Spanish. Language toggles at the session level — a crew member can switch languages without logging out.

Mobile-first, offline-capable: technicians use phones, not laptops. Every core workflow (estimate creation, diagnostic lookup, callback scheduling) works with degraded connectivity. AI companion, not AI replacement: the AI provides reference documentation, suggests follow-up questions, and drafts estimates based on technician notes.

Stack: Next.js (PWA with service worker for offline), FastAPI backend with Spanish/English prompt templates, Supabase (auth + data with RLS for multi-tenant team accounts), Resend for transactional email, AWS S3 for invoice/estimate PDF storage. Bootstrapped pre-seed with no external capital.

Bilingual UI (EN/ES) — all copy, labels, AI responses, and notifications. AI diagnostic companion — natural-language symptom input, structured system guidance output. Estimate builder — field-input form → branded PDF → email delivery.

Callback scheduler — lightweight CRM for follow-up management. PWA with offline mode for core workflows. Beta deployment to initial Phoenix-area HVAC contractors.

Beta live with initial cohort of Phoenix-area HVAC contractors. 100% bilingual coverage from first public release — no "coming soon" for Spanish. Estimate-to-callback workflow tested and validated by actual contractors.

Zero external capital required to reach beta: fully bootstrapped.

Bilingual-from-scratch is an engineering discipline, not a translation afterthought. Building it into the architecture (prompt templates, UI copy management, locale routing) from day one is significantly less work than retrofitting it. Trayd validated that small trades businesses will adopt software if it matches their actual workflow.