MultiFit is an iOS app for powerlifters — built around the big lifts, not generic "sat down, stood up" workouts. Eduardo came to us with a working app already in the App Store and a small ask: clean up the workout log, exercise list, and templates. After the kickoff and a proper audit, the scope opened up. The structure was solid, but the UX was tangled and the visual layer wasn't pulling its weight. We agreed to redesign the whole thing.

We kept the architecture, kept the core flows, and rebuilt everything on top. The home screen now leads with a calendar — expand it, scrub past dates, copy a session into another day or straight into a program. Workout and Program Templates share one logical space, with weeks and per-day exercises stacked cleanly. We rebuilt the Plate Loader as a calm, animated front-and-center module with real plate colors, real proportions, and configurable sizes — no scrolling, no guessing. The exercise card got a small but hard-won feature: a group/ungroup toggle that collapses identical sets into one row or fans them out for set-by-set entry. We redrew that card maybe seven times. It was worth it.

Mid-project, Eduardo wanted an AI layer. We folded in Yay — a chat-style coach that reads your logged lifts and suggests what to train next. That pulled in an analytics screen we hadn't planned: deep stats per movement, growth over time, the data Yay needs to actually be useful. Tools (Plate Loader, RPE calculator), login, profile, templates, AI chat, analytics — six surfaces, one system. We also tightened the logo and shipped the full App Store mockup set, linked design system included.

It started as a screen polish. It ended as a redesigned product.