Iron U: Triathlon Plan

Iron U is a training plan for your first half-distance triathlon that changes when your week does.

A plan written once stops looking at you. A tracker only tells you what already happened. Iron U does the part in between: it decides today's session, reads what your watch recorded, judges it against what it asked for, and rewrites tomorrow.

TODAY
One session a day, chosen from your race date, your last four weeks and how you slept. Swim, bike, run and strength, with the target zones and the reason for each.

READINESS
Sleep, resting heart rate and heart-rate variability become a check that can only make a day easier. It never asks for more.

DEBRIEF
After every session: was the easy run actually easy, how much time in each zone, how it compares with the plan, with the numbers.

PROGRESS
The countdown to race day and distance gates (400 m, 750 m, 40 km, 21 km) instead of a streak counter. A missed day is data, not failure. A widget puts the countdown and today's session on your home screen.

FUEL
Photograph a meal or a drink and it becomes a log, with an honest range rather than a fake-precise number. Weight is tracked against a gentle curve, never a crash diet.

LEARN
A course of short lessons on swimming technique, pacing, fuelling, heat and race day, each one arriving just before the session that needs it.

EXPLORE
Say how much time you have and Iron U suggests a few rides to match, with the distance, the climbing and when you will be back.

STRENGTH
A guided player for the strength sessions in your plan: a short demonstration for every exercise, spoken cues and a timer, so you can keep your eyes off the screen.

HEALTH CONNECT
Iron U reads your workouts with their distance and heart rate, your resting heart rate, sleep and weight from Health Connect, read-only. Workouts are compared with the plan and debriefed; resting heart rate and sleep feed the morning readiness line on Today; sleep and weight draw their charts in Progress. A watch whose app writes to Health Connect gives it the most to work with. Health data is used only to plan and explain your training: never for advertising, never sold.

AI, WITH YOUR PERMISSION
Meal photos and summaries of your training are sent to an AI model to write the texts, only after you allow it, and you can turn it off at any time in Settings. The app says which providers receive what before you agree. Without AI, Iron U still plans your days and shows the numbers. The AI that writes the texts is included free with your account.

WHAT IT IS NOT
Not a medical device and not a replacement for a doctor or a human coach. It does not diagnose anything, and it asks you to see a doctor before you start.

Free. An account is needed, so your plan follows you between devices. You can delete the account and every piece of your data from Settings at any time.

In English, Spanish and Russian.