Flex AI Workout Trainer & Log
Quick Info
App Details
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.
Screenshots (6)
Editor Review
The AI Tools Oasis team finds Flex AI a game-changer in personal training, thanks to its patented real-time form correction AI, making it ideal for serious lifters. Its biggest strength is automatic adaptation to strength curves and science-backed deloading. The only caveat is that advanced features require a paid subscription, and it may not suit those seeking non-weightlifting workouts.