PromptSpace Pro is a cloud-synced Prompt IDE & ready-to-sell Gumroad SaaS template. Optimized for Vercel & Turso, it streamlines prompt engineering with robust privacy. Key features: Version History: Visual Git-like split-screen diff comparison and rollbacks. Batch Matrix Runner: Test templates across variable arrays in parallel. Cost Analytics: Real-time token and API spend tracking. SaaS-in-a-Box: Built-in Gumroad license gate—ready to rebrand and sell.