Mobile overhaul of an AI powerlifting app

JuggernautAI is the category-leading AI powerlifting app — it writes and adapts each lifter's program week to week. I partner with the team on an ongoing mobile overhaul: reworking the core workout experience and shipping new features on a progressive roadmap built for engagement and long-term retention.

A serious training app has to hold committed lifters for months and years, not days. The core loop — see your program, check in, log every set — had to feel fast and motivating on iOS while surfacing the intelligence underneath (readiness, autoregulation, progressive overload) without overwhelming a lifter mid-workout.

Reworked the core workout loop end to end — program overview, day selection, and in-workout set logging — so the most-used screens are the fastest.

Designed the adaptive readiness check-in that feeds the AI: a quick, tappable 'how are your muscles feeling' flow that adjusts the day's training.

Designed warm-up guidance, plate math, and performance / weight entry so the app does the thinking a lifter would otherwise do between sets.

Shipped features on a progressive roadmap aimed squarely at engagement and longevity — the metrics that keep a training app alive.

A cleaner, faster iOS training experience with the intelligence made visible where it helps and invisible where it doesn't. A program dashboard that shows the whole block at a glance — phases, weekly volume, day-by-day progress — a readiness check-in that tunes each session, and an in-workout logging flow tight enough to use between heavy sets, with warm-ups, RPE targets, plate math, and set history all one tap away. Delivered as an ongoing partnership on the app's design language and feature roadmap.

Start a project