The Iron Church — building an AI coach that actually trains you
An AI personal trainer that programmes every session for your body, your equipment, and your goal — written up one dispatch at a time. The build, the science, the engine, and the app itself, gathered here in one place.
Every session programmed for your body, your equipment, your goal.
Most fitness apps slap a chatbot on a decision tree and call it AI. The Iron Church runs deterministic state engines for fatigue and periodisation, then lets the AI reason over sixteen layers of your context before it writes a single set. Periodised, progressive, equipment-aware — and it never loses track of where you are.
Name your disciple
Enter your name, pick your training discipline, choose your coach mode. Thirty seconds and you’re in.
AI forges your session
Periodised, progressive, equipment-aware. Tap Generate and train — no spreadsheets, no guesswork.
Log, track, ascend
PRs auto-detected. Brodin’s verdict after every session. Share your victories and rise through the ranks.
The Iron Engine
Every session is built from sixteen layers of your context — biometrics, 1RMs, equipment, injuries, mesocycle phase, and a live fatigue heatmap. Deterministic state engines keep the AI honest.
The Forge
Don’t want the AI to programme for you? Hand-build your own block from 1,300+ exercises, set your split, define your weeks. Brodin reviews it for balance before you commit.
20 Disciplines
Each discipline carries its own AI programming rulebook — German Volume Training is not High-Intensity Training. Includes Hybrid Training, which manages the endurance–strength interference effect.
Brodin Goes Where You Go
Your gym, a hotel, the open road. Travelling on dumbbells only? Rucking a park circuit? Every one-off session still feeds your fatigue heatmap and history. Nothing is wasted.
Trials & Ranks
Time-limited challenges and lifetime feats. Every session earns XP; every PR earns more. Climb from Novice to Eternal — Bronze, Silver, Gold, and Obsidian for those who reach Swolehalla.
It Connects
Syncs to Strava with your exercise list, PRs, and Brodin’s verdict. Installs as a PWA — no App Store. Cinematic SESSION SANCTIFIED share cards for Instagram and WhatsApp. Apple Health & Google Fit. Nutrition coming soon.
- 5 AI-generated sessions
- The Forge — unlimited custom plans
- PR tracking & history
- Muscle heatmap
- Brodin’s Trials challenges
- Congregation access
- Unlimited AI-generated sessions
- Campaign planning (8–24 week)
- Phase & milestone push notifications
- Full exercise swap engine
- Priority AI feedback
Why most AI fitness apps are just marketing
A decision tree with a chatbot bolted on is not AI. The actual architecture behind Iron Church — deterministic state engines, five specialised prompts, and why the model is a commodity but the context is the product.
Why do people quit fitness training?
Six evidence-backed reasons people abandon the gym — and why flexible, fatigue-aware programming keeps them. Eighty percent adherence on a good plan beats sixty percent on a perfect one.
Four goals, four engines
Get stronger, build muscle, lose weight, feel healthier — each is a different physiological adaptation, not a generic split. How the Adaptive Stack programmes for the goal you actually chose.
Enter the temple
Iron Church is live and every feature is shipping. Name your discipline, pick your coach mode, and Brodin forges your first session in thirty seconds. Your feedback shapes what gets built next.