How 12345 Boom Works
From sign-up to your first adapted workout in under 10 minutes. Here's how we make it happen.
Download the App
Get 12345 Boom from the App Store or Google Play. Free to download, no credit card required to start.
- Available on iOS and Android
- Less than 50MB download
Complete the Questionnaire
Tell us about yourself in a quick 6-step questionnaire. This helps us understand your starting point and goals.
- Your sports (running, cycling, triathlon, etc.)
- Current fitness level and training history
- Weekly time available for training
- Goals (race, fitness, weight loss, etc.)
- Equipment and preferences
Connect Your Apps
Link your Strava, Garmin, or Wahoo account to automatically import your activity history and future workouts.
- One-tap OAuth connection
- We import your last 30 days of activities
- New activities sync automatically
Get Your AI Plan
Within seconds, our AI generates a personalized 3-week training plan based on everything you told us.
- Structured workouts with clear instructions
- Rest days strategically placed
- Progressive overload built in
Train and Adapt
Complete workouts, log how you felt, and watch your plan adapt. Miss a workout? No problem—we adjust.
- Post-workout evaluation (1 minute)
- Plan updates after every session
- Suggestions for when life gets in the way
Track Progress
See your fitness grow with detailed analytics, personal records, and AI-generated insights at the end of each training cycle.
- Fitness and fatigue trends
- Personal records across all sports
- AI coach insights every 3 weeks
The AI Behind Your Plan
Powered by Claude, one of the world's most advanced AI systems.
Understands Context
The AI considers your goals, fitness level, available time, equipment, preferences, and life circumstances.
Applies Science
Built on established training principles: periodization, progressive overload, specificity, and recovery optimization.
Learns From You
Every workout you complete teaches the AI more about what works for you specifically.
Real-World Adaptations
Here's how 12345 Boom handles common scenarios.
You missed yesterday's workout
We analyze if it was a key session. If so, we reschedule it. If not, we absorb it and move on—no guilt trip.
You went on a surprise 80km bike ride
We detect it from Strava, calculate the training load, and adjust tomorrow's hard run to an easy recovery session.
Rain forecast for your long run
We suggest an indoor treadmill alternative, or help you swap with another day this week when weather is better.
You rated your last workout as "felt terrible"
We reduce intensity for the next few days and add extra recovery time. Your body is telling us something.
You're training with kids this week
We provide modified workouts: shorter intervals, playground-friendly exercises, stroller-compatible runs.
You PR'd your 5K in a training run
Congrats! We record it, update your training zones, and adjust future paces to match your new fitness level.