Flex AI Workout Trainer & Log vs Workout Builder

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.

Workout Builder lets you create custom workouts on your iPhone and send them to your Apple Watch. Build advanced workouts like: - Running workouts for tempo runs, intervals, hill sprints - Cycling workouts for intervals, pyramids, and distance efforts - Swimming workouts for specific distances and times - Flow, Yin, Vinyasa yoga - HIIT & Strength training intervals - Boxing and skipping intervals, with rest included - Plus many, many more sports! Workout Builder has three types of workouts you can send to your Apple Watch - Simple, goal-based workouts – set a time, distance, or energy burn goal - Advanced interval workouts – add multiple sets and reps, along with rest, warmup, and cooldown - Paced workouts – set a time and distance goal and pace your workout