Quotepilot

Offline quote & invoicing app for painters, built with job mgmt tools & AI

by Thomas Kuhn

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Oct 2, 2026 Productivity

estimates invoicing job management offline painters

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Offline estimate and invoicing app built for painting contractors. No internet or subscription needed, everything runs locally. Includes a quote/estimate builder, invoicing, and job management tools: time logs, expense ledger, change orders, payment milestones, and handover reports. The latest version (v2.3) added a visual room editor with 3D/plan/elevation views and draggable doors/windows for faster room-by-room quoting.Built as a single-file HTML app, AI-assisted development.Listed on Gumroad at $29. Traffic has been decent (1000+ views in under 2 hours during a recent push) but sales have been minimal so far I haven't cracked distribution for this specific niche (painting contractors aren't really active on the channels I tried). Selling because I want to move on to a different project, not because the idea doesn't work.What's included:Full source code Existing Gumroad listingDemo video and cover art