Endurance training — redefined

YOUR SEASON.YOUR DATA.YOUR IRON3.

IRON3 helps athletes discover events, structure their season, and track performance after every training session.

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Three disciplines

SWIM. BIKE. RUN. One season.

Each discipline has its own rhythm. IRON3 understands all three — and the thread that connects them to your start line.

Open Water

SWIM

Master the first discipline. Track pace, distance, and technique evolution.

On the Road

BIKE

Build power on every ride. Structured sessions that compound into race fitness.

To the Line

RUN

Finish what you started. Every stride logged, every split measured.

60-second film

THE EMOTIONAL JOURNEY OF ENDURANCE.

Early alarms. Quiet roads. The work nobody sees — and the belief that keeps you showing up. This is the atmosphere IRON3 was built for.

Sound optional · best with headphones

Inside the app

THREE LENSES. ONE SEASON.

Discover races that matter. Build preparation that compounds. Review every session with clarity — swim, bike, run.

IRON3 Race Calendar showing upcoming IRONMAN events worldwide

IRON3 PREP Plan showing weekly training schedule with swim, bike, run

IRON3 Swim session logging with duration, distance, and effort tracking

Plan the season171 events worldwide — find your next start line

Works with your ecosystem

SYNC WITH THE TOOLS YOU ALREADY TRUST.

IRON3 connects with the wearables and platforms endurance athletes rely on — so your training diary stays honest, complete, and ready for race week.

Garmin Fenix 8 sports watch on black background

COROS PACE 3 sports watch on black background

Wahoo ELEMNT RIVAL multisport watch on black background

Suunto 9 Peak Pro sports watch on black background

GarminFenix 8

Garmin ConnectApple HealthStravaTrainingPeaksOuraCOROS

Prepare smarterRace strongerTrack everythingIRON3SwimBikeRunPreparePerformProgress

PREPARE FOR MORE THAN A RACE. TRAIN FOR THE DAY THAT CHANGES YOU.

The start line is not a moment — it is the edge of every early session, every hard repeat, every honest recovery. IRON3 turns your season into a single narrative you can see, feel, and trust.

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How it works

METHODOLOGY BUILT FOR LONG-COURSE REALITY.

IRON3 connects planning, execution, and review — so the story of your season stays coherent from first build to final taper.

Event-first planning

Choose your target event and structure your season around it — milestones, priorities, and the weeks that actually move the needle.

Structured preparation

Align training blocks with your event timeline and discipline focus. Clear intent beats vague volume.

Session-by-session tracking

Log results, review metrics, and see progression after every workout — not as noise, but as signal.

Race-ready decision making

Use data and calendar context to train smarter, recover deliberately, and taper with confidence.

Ecosystem

MORE THAN TRACKING. A PREPARATION SYSTEM.

IRON3 weaves guidance across disciplines with performance context — a single place where swim, bike, run, recovery, and race strategy connect.

Swim guidance

Bike guidance

Run guidance

Performance data

Recovery insight

Race planning

Swim guidance
Bike guidance
Run guidance
Performance data
Recovery insight
Race planning

IRON3 Global Leaderboard showing friends, global, and local rankings

Community

JOIN 42,000+ ATHLETES WHO TRAIN WITH PURPOSE.

From first-timers to podium chasers — IRON3 athletes share one thing: they don't leave their season to chance.

0+Athletes worldwide

0Countries represented

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0.0/5App Store rating

“
IRON3 completely transformed how I prepare for IRONMAN. The structured plans and session tracking gave me confidence I never had before.
Marcus D.
3× IRONMAN Finisher · Austin, TX

“
Finally an app that understands triathlon isn't just three separate sports. The brick session logging alone is worth it.
Sarah K.
Age Group Champion · Melbourne, AU

“
Went from DNS anxiety to a sub-12 finish. The race calendar and PREP planning kept me honest every single week.
João P.
First-time 70.3 Finisher · Lisbon, PT

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