PAZ. Performance

PAZ. Performance is a personal trainer that lives on your phone. It is an installable web app, in Spanish and offline, that builds a 26-week plan to gain muscle combining weights, PowerClub and football, with nutrition, recovery and progress tracking. No accounts, no servers: all data stays on the device.

It starts with a four-step onboarding that works out calories, macros and the typical week. Every day the app answers one question: what am I doing today. At the gym it guides set by set with weight, reps, RIR and rest, and the daily check-in adjusts the load to how you slept or whether you played football. The Colombian meal plan matches the day’s calories, and Evolución shows weight, estimated strength and sets per muscle to decide with data. I designed and built it with Claude Code.