I built an AI tool that turned my phone selfie into a LinkedIn headshot — here's what I learned

The product I shipped HeadshotAI a couple of days ago. Upload one photo, pay GBP4.99, get a professional headshot in about 30 seconds. Powered by FLUX. This is what I learned. Lesson 1: If they can't see the output, they won't pay I launched without any example outputs. Just a description and a CTA. First comment on the Hacker News Show HN post: "An obvious point, but your marketing page absolutely needs a before -> after comparison. Just showing the after image doesn't work." They were right. I shipped a before/after section within 40 minutes. The lesson: For AI tools that transform content, before/after is not optional. It's the entire value proposition made visible. Lesson 2: Single-image generation is harder than multi-image fine-tuning Every major AI headshot service (HeadshotPro, Aragon, etc.) asks for 10-25 photos. They fine-tune a model specifically on your face, which gives very reliable results. I wanted something with zero friction: one photo, immediate output. The risk: FLU