Flex AI Workout Trainer & Log

Flex AI is the world’s first true AI personal trainer — built for lifters who want to train smarter, progress faster, and perfect their form.

Whether you’re chasing size, strength, or consistency, Flex uses real-time AI to guide every rep, adjust your program, and keep you motivated through challenges, leaderboards, and streaks.

- Your AI Coach, Every Rep

Personalized workouts built automatically by AI personas that learn your goals, history, and preferences.

Real-time form feedback powered by patented computer-vision AI — get instant corrections on squats, bench, deadlift, rows, and more.

Adaptive progression and deloading backed by sports-science principles — no spreadsheets, no guesswork.

- Train Smarter — See Results

AI tracks your strength curve and increases weight when you’re ready.

Visual progress graphs show PRs, volume, and recovery trends.

Track sets, reps, and tempo with a tap — or automatically with Apple Watch.

- Stay Motivated & Connected

Join a global community of lifters.

Compete on leaderboards, build streaks, and earn badges.

Post progress photos, celebrate milestones, and share results.

- Accessible to Everyone

Free to start with all core features included.

Upgrade anytime for advanced AI coaching and premium analytics.

Designed for all experience levels — from beginners to pros.

- Why Flex AI

Real-time AI form feedback (patented)
Adaptive, science-based programming
Progress tracking & recovery insights
Gamified streaks + leaderboards
Apple Watch integration
Built for hypertrophy & strength goals

Start Training Smarter — Today

Download Flex AI and experience personal training powered by real AI.
Perfect your form. Unlock your best lift. Train smarter — free on iPhone + Apple Watch.