AI

Hi, I'm BULK, your AI coach

A Personal Muscle Growth PhD for Every Trainee in the World

AI Personal Coach 'BULK' scientifically proposes your unique muscle growth strategy. Achieve the shortest path to growth through continuous dialogue, 24h/365d.

24h/365d
AI Coach Available Anytime
5 sec
Recording Time for AI Learning
500+
Research Papers BULK References

You Don't Need to Struggle Alone Anymore

"Is today's training right?" "Why has my growth stopped?" For such questions, AI coach 'BULK' derives optimal answers from scientific evidence and your past data. The more you dialogue with BULK, the clearer your personal muscle growth strategy becomes.

Latest Muscle Growth Science
AI-Powered Personalization
Ultra-Fast Recording

Accelerate Growth Through Dialogue with BULK

  • Instant answers to questions during training
  • AI that remembers your growth journey
  • Personalized advice with scientific backing
AI-Powered

BULK Learns from 5-Second Recording

  • Predicted values displayed from previous data
  • One-tap correction for any changes
  • The more you record, the smarter BULK becomes
Visualization

Transparent Scientific Proposals

  • Research papers cited for all suggestions
  • Clear explanations of why each proposal
  • AI confidence levels displayed honestly
Optimization

Continuous Growth Support

  • BULK encourages during plateaus
  • A partner who celebrates success with you
  • Accompanies you to long-term goals
Integration

BULK's Scientific Knowledge

BULK is well-versed in the latest muscle growth research and makes optimal suggestions by comparing with your personal data. Because you can understand the 'why', you can train with confidence.

15%
Effective Auto-adjustment
RPE/RIR-based optimization
12 weeks
15% increase in muscle CSA
Personalized programs
40%
Improved hypertrophy effect
Integrated approach

Research-Based Principles

Automatic management of progressive overload

Optimization considering individual differences

Recovery-focused program design

Simple and Sustainable Pricing Plans

Free

Free
  • Basic training recording
  • 30-day history
  • Weekly volume display
  • Weekly training evaluation
  • Next week volume suggestions
Join Closed Beta
Recommended

Pro

$9.99/month/月
  • All basic features
  • Daily training detailed analysis
  • Rest timing optimization suggestions
  • Personalized next training suggestions
  • Advanced AI personalization
  • Unlimited history access
  • Plateau detection and breakthrough strategies
Available after official release

*Priced at about 1/3 of similar muscle-growth focused AI coaching apps

Why BULK is Chosen

1. True AI Personal Coach

Not just a chatbot. BULK remembers your past, celebrates growth with you, and provides accurate advice during plateaus - a real coach.

2. Open App to Talk, Not Record

You open the app to talk with BULK, not to record. This results in high-quality data collection and more precise coaching.

3. Effortless Data Collection

Just 5 seconds of recording provides BULK with rich context. Focus on training and dialogue without tedious input tasks.

FAQ

Q: Can beginners use it?

A: Absolutely! BULK addresses beginners' anxiety of 'Am I doing this right?' with easy explanations. No jargon - BULK adapts to your level.

Q: How smart is BULK?

A: BULK knows 500+ latest research papers and learns your characteristics through dialogue. The more you use it, the more it grows into your personal muscle growth PhD.

Q: Does recording take time?

A: Only 5 seconds! BULK displays predicted values from previous records - just one tap if nothing changes. Even in this short time, BULK learns much and improves suggestions.

Q: Is my data safe?

A: Using Cloudflare's secure infrastructure with GDPR-compliant privacy protection.

BULK is Waiting for You

You don't need to struggle alone anymore. With AI coach BULK, achieve the shortest path to muscle growth based on scientific evidence.