AI Personal Trainer

Your No-Excuses
Personal Trainer

Tell GREX your goals once. It builds your workout, coaches you through every set, and gets smarter as you get stronger. No planning. No guessing.

Download on App Store ✅ Now Live on the App Store
Alex — Your AI Personal Trainer
103+
Exercises in Library
8
Muscle Groups
24/7
AI Coach
AI
Powered Coach

Open the app.
Your workout is ready.

No planning required. Every morning your personalized workout is built and waiting — gym or home, whatever you have available.

Build Muscle, Stay Motivated, Quick Cardio

Real answers.
Real coach.

Ask Alex anything — form tips, what to eat, how to warm up, whether to push through or rest. Instant answers, personalized to your goals and history.

Try Free for 3 Days
Alex AI Coach Chat

Every exercise.
Perfect form.

Built-in form guides with visual cues for every exercise. Gym or home — swap your workout in one tap when plans change.

Guided Workout, Gym Workout, Home Workout

No excuses.
Just results.

🏋️
Personalized Workouts
Built around your goals, experience, equipment, and schedule. Every session, every day.
🤖
AI Coach (Alex)
Ask anything, get real answers instantly. Powered by Claude AI with full context of your training history.
🏠
Gym → Home in One Tap
Travelling or no equipment? Swap your entire workout to bodyweight alternatives instantly.
📈
Strength Tracking
Personal records tracked automatically. Watch your numbers go up week over week.
🏆
Gamification
Level up from Rookie to G.O.A.T. Daily goals, XP, streaks — training that actually keeps you coming back.
🎯
Form Guides
Visual cues and coaching tips built into every exercise so you always know what you're doing.

Start free.
Stay strong.

Plans for every fitness level. Cancel anytime.

Weekly
$4.99/wk
Billed weekly
Monthly
$14.99/mo
Billed monthly

No planning.
No guessing.
No excuses.

Download GREX and get your first workout in 60 seconds.

Download on App Store — Free

iOS only · Requires iOS 16.0 or later