Working with founders to design and finish their product.
Jamie is a solo founder and competitive bodybuilder whose previous developer built something that did not match how serious lifters actually train. I rebuilt it in React Native around how the sport really works, down to how a single set gets logged.
The problem
The earlier build was broken in the places that mattered. Generic fitness apps collapse the nuance bodybuilders care about. "Incline DB press, 30°, neutral grip" is not the same exercise as a flat barbell bench. Serious lifters track them as distinct. On top of that, bodybuilding is social: lifters want to share, get feedback, meet others in the scene.
The approach
Started over from scratch in React Native. Designed a custom exercise matching system covering 180+ exercises across grip, stance, position, unilateral vs. bilateral, and cable vs. free weight, so every logged set is a distinct, analyzable variant. Built the social layer around real community behavior. Handed off with the patterns, context, and momentum for Jamie to take it across the finish line himself.
Outcomes
- →Live on the App Store, 5.0 ★
- →180+ exercise variants tracked by grip, stance, and position
- →Built around how the sport actually works, not a generic tracker
“Cristian did an incredible job. Very quick to make changes, very knowledgeable, and always asked questions to ensure he was building with my vision in mind.”