BodyFat is a mobile-first app that uses computer vision and on-device AI to estimate body fat percentage directly from photos — fast, private, and accessible. Designed for everyday users, fitness enthusiasts, and health-conscious individuals, BodyFat removes the need for expensive hardware, calipers, or clinic visits by turning a smartphone camera into a smart body composition tool. Our scope focused on building a reliable, intuitive experience that balances accuracy with ease of use. We implemented the full mobile pipeline — from guided image capture and pose normalization to AI-based body analysis and clear result visualization — all optimized to run smoothly on consumer devices. Special attention was given to UX clarity, privacy-first processing, and performance across a wide range of phones. Estimate body fat using photos — no equipment required Guided capture flow for consistent, repeatable results On-device AI processing with a privacy-first approach Clean, simple results tailored for non-technical users BodyFat delivers a modern, approachable way to understand body composition — right from your phone.