Vibe Coding: How a Non-Developer Built a Calorie Tracking App with Claude in 3 Hours

A Reddit user on r/ClaudeAI describes building a custom calorie tracking iOS app using vibe coding — writing plain English prompts to Claude, which generates markup files dropped into Xcode. The process took three hours with zero prior dev experience.

How It Works

• The user writes a natural language description of a meal (e.g., “1 chicken breast in home made bbq sauce with ketchup, brown sugar, worcestershire sauce and spices and 1 medium sweet potato”).
• The app calls the Claude API to return calorie estimates, reasoning, and a confidence level.
• UI is built with SF Icons and Pills — Apple's native design components.
• A daily graph shows calories and average intake.

Planned Feature

Next step is pulling weight data from Apple Health to correlate eating habits with weight changes — all within the same subscription-free app.

Key Takeaway

Claude's ability to generate Xcode-ready markup files from conversational prompts lowers the barrier for non-developers to build fully functional iOS apps. No subscription fees; just the Claude API cost.