Would anyone actually pay for a “24/7 nutrition coach” chatbot when ChatGPT already exists?

Hey all,

I’m curious about something and wanted to get input from people who actually think about chatbots instead of just “normal users”.

I’ve been experimenting with an idea for a health / nutrition assistant. The rough concept is:

• 24/7 chat-based “nutrition partner” (not just a food tracker)
• Focus on building tiny daily habits instead of strict diets / macros
• More like texting a human coach: you send meal photos, quick notes, “I’m craving X again at 11pm”, etc.
• The bot remembers your history, patterns and struggles (binge times, emotional triggers, schedule) and reflects them back to you over time
• Gentle nudges and small challenges (“this week let’s try 1 more veggie serving at lunch”) instead of “you failed your calories” vibes
• Language and guidance backed / reviewed by real nutrition professionals, but delivered through an always-on agent
• Ideally low-cost, more like “cheap personal trainer for your meals” than yet another premium diet plan

I had a friend try an early version and his honest reaction was:

Which is fair. So I’m trying to understand from a chatbot perspective:

1. Where do you see real value in a vertical agent vs. generic LLM?
   • Long-term memory?
   • Specific guardrails / tone?
   • Workflow design (check-ins, streaks, experiments)?
2. What would make a “nutrition coach bot” actually feel different from just opening ChatGPT?
   • Is it UX (onboarding, reminders, visuals)?
   • Deeper integration with photos / logging?
   • Evidence-based content with some kind of expert oversight?
3. Would you ever pay for something like this?
   • If yes, what would you expect it to do better than ChatGPT?If no, what’s the deal-breaker—trust, liability, “don’t want bots in my health”, or just “LLMs are enough”?
4. Any red flags you see from a product / ethics perspective? (e.g., over-promising “medical” results, handling disordered eating, data privacy, etc.)

I’m not here to drop links or sell anything—just trying to sanity-check whether this kind of specialized “always-there nutrition partner” has legs, or if it’s destined to be swallowed by general-purpose models + good prompt engineering.

Would love any honest takes, especially from people who’ve built vertical agents or subscription bots before. 🙏