heybro
50 users. 15 days. $0 in adsAn AI fitness coach that calibrates from behavior, not a form. No self-reported fitness levels, no generic routines. What started as a personal coach became a retention program for a gym with 800 members.

Built and shipped in one week as an MVP. The product didn't need marketing, it needed to work well enough that users told other users.
Product: heybro
Project: 0->MVP
Role: Product Designer · AI Design Engineer
Focus: AI-first · Retention
Industry: Health & Fitness · B2C