Thorax · AI Workout Tracker

Thorax is the AI-powered training companion built for lifters who want to train smarter — not just harder. From your first session to your 1,000th, Thorax tracks everything that matters and uses AI to help you make sense of it.

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🏋️ WORKOUT TRACKING
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Log every set, rep and weight with a fast, distraction-free interface built for the gym floor. Track rest timers, supersets and session duration. Automatic PR detection alerts you every time you break a personal record. 500+ exercises included — or create your own.

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🤖 THORAX AI COACH
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Your personal AI coach lives inside Thorax. Generate complete weekly training programs tailored to your goals, experience level, available equipment and training days. Get personalized feedback after every session: what you improved, what to fix, and what to focus on next.

Choose your coaching style. Ask your coach anything in natural language: "Which muscle am I neglecting?" or "How has my squat progressed this year?"

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💪 MUSCLE RECOVERY AI
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Know exactly when each muscle is ready to train again. Thorax tracks stimulus and fatigue per muscle group and shows you a real-time recovery status: Fresh, Recovering, Fatigued or Exhausted. Never overtrain — and never undertrain — again.

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📋 ROUTINE BUILDER
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Build fully custom workout plans or generate them with AI. Schedule by day of the week, configure sets, reps and rest times per exercise, and build supersets.

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📈 BODY PROGRESS
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Track 19+ body metrics: weight, body fat, muscle mass, BMI, and full circumference measurements. Upload progress photos in 6 body zones and compare side-by-side across any time period.

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📊 ANALYTICS
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Per-exercise progression charts, muscle group volume tracking, 1RM history, training frequency, calorie burn estimates and consistency streaks. See your long-term trends and understand what's driving your results.

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🏆 ACHIEVEMENTS
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40+ achievements across strength milestones, consistency streaks and special challenges. Hit your first 100kg squat, complete a 30-day streak or earn the Early Bird badge for early morning sessions.

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👥 SOCIAL & COMMUNITY
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Follow friends, share workouts and compete on exercise leaderboards — who lifts more, who has the highest 1RM, who accumulates the most volume. Share your routines so others can import them with one tap, or import from your training partners. React, comment and stay accountable together.

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📅 SPORTS & CALENDAR
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Not just weights. Log running, cycling, swimming and 50+ sports alongside your gym sessions. A monthly training calendar gives you the full picture of your activity, rest days and upcoming workouts.

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🔗 INTEGRATIONS
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• Health Connect — sync weight, heart rate, steps, sleep and calories
• Strava — automatically upload your sessions
• Import from Hevy, Strong or Fitbod — AI-powered data migration in minutes

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FREE TO USE
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Core workout logging, routine building, body tracking and social features are completely free. Thorax Premium unlocks unlimited AI coaching, full workout history, unlimited routines, custom exercises, advanced analytics and more — with a free 1-month trial.

Works offline. Syncs across devices. No ads. Available in English and Spanish.

Download Thorax — and start training with purpose.