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.
Let Brodin name your path
Five questions — your hunger, your history, your days, your armoury, your temperament — and Brodin names one of 21 disciplines as yours. Or pick from the full list yourself. Sixty seconds, free, no account.
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.
21 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. Not sure which is yours? The Naming quiz will tell you in sixty seconds.
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. On the iOS App Store now — or run it free in any browser. 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.
Iron Church goes live on the App Store
The announcement: an honest AI personal trainer — a real LLM over a deterministic engine — lands on iPhone. What it is, what it costs, what makes it different, and answers to the questions everyone asks.
Which of the 21 paths of iron is yours?
Brodin asks five questions and names your training discipline — with its saints, its road, and your first workout revealed. Sixty seconds, free, no account. The funnel is the front door now; step through it.
Enter the temple
Iron Church is live on the iOS App Store. Name your discipline, pick your coach mode, and Brodin forges your first session in thirty seconds. Free to start, with a 14-day trial on the rest. The doors are open.