Try PIRX risk-free — 14-day money-back guarantee·Sign Up →

Two elite sprinters at full stride on a red outdoor track

Performance Intelligence Rx

Your
training
has a
number.

Connect your watch. PIRX delivers the most accurate race-time projection on the market, then tells you which seconds came from where. Built by Olympians. Works with the watch you already own.

Start your 14 day free trial How it works

14-day money-back guarantee · No credit card required

Get the app

Available Soon

Available Soon

Ambassadors

Backed by Canada's next generation of runners.

National team athletes and record holders training with PIRX every day.

Brody Clark

Middle-distance · Cross country · Milton, ON

Maya Markowska

Middle-distance · Burlington TFC

Riley Innes

Distance · Newmarket Huskies TC

Partners

Trusted by the organizations building Canadian distance running.

We partner with federations, clubs and brands committed to helping runners train smarter.

Interested in partnering with PIRX? Get in touch.

Most accurate modelon the market

180k+

Projectionsdelivered

4.9 / 5.0

Beta testerrating

10+

Wearablessupported

Available onGARMINCOROSPOLARAPPLE WATCHSUUNTOWHOOPOURASTRAVA

The Problem

Hard work.
Zero answers.

Months

Average time wasted before a runner figures out a training block isn't working.

Other platforms tell you how recovered you are. PIRX tells you what you're capable of.

01Wastes mileage on the wrong workouts

02Hits the same personal best ceiling every season

03Trains hard with nothing to show

04Has no idea what's actually working

05Keeps getting injured mid-block

06Doubts the plan at the start line

Don't let your hard work
go to waste.

Start your 14 day free trial

How it works

Four steps to your
fastest race ever.

Connect yourwatch

Garmin, COROS, Polar, Apple Watch, Suunto, WHOOP, Oura link in 30 seconds. No new hardware.

Get yournumber

PIRX analyzes your training history and delivers the most accurate race-time projection on the market.

See where itcomes from

Five performance drivers, scored 0–100, broken down to the second. No guessing.

Train withconfidence

Adaptive plan, race-day readiness, and injury risk alerts, every day, on your wrist.

Your number

Just sync your
watch. We'll handle
the rest.

The most accurate race-time projection on the market

PIRX analyzes your training history and builds a projection that updates every day. No spreadsheets. No guessing. One number that tells you exactly where you stand.

“The first tool that actually told me what my training was worth.”
— PIRX Beta Tester · Sub-3 marathoner

PIRX run analytics on iPhone — heart-rate trace, zone breakdown, driver attribution, and a 4:39 → 4:31 1500m projection

PIRX driver breakdown shown across two iPhone screens

Five drivers

Know which
seconds came from
where.

Effective, science-backed breakdown

Aerobic Base. Threshold. Speed. Economy. Consistency. Five drivers, each scored 0–100 and broken down to the second. So you stop guessing what's working, and start training the right thing.

“The driver breakdown changed how I plan every block.”
— PIRX Beta Tester

Garmin Fēnix watch on a runner's wrist with a red track in the background

Works with your watch

No new hardware.
No friction.

Garmin · COROS · Polar · Apple · Suunto · WHOOP · Oura

Connect in 30 seconds. PIRX pulls from every wearable you wear and every app you sync — Strava, Apple Health, Google Fit. One number, all your data.

“Linked my Garmin in under a minute. Had a projection before my coffee finished.”
— PIRX Beta Tester

PIRX · 3 min ago

Your last three threshold sessions came in 4% above target HR. You're projecting 3:14:23, but your aerobic base is the lever — adding one easy 90-min run this week pulls projection toward 3:13:11.

Drivers · baseConfidence ±5s

Personalized insights

Smarter feedback.
Better results.

Every insight cites your real numbers

PIRX never makes things up. Every recommendation pulls from your projections, drivers, readiness and injury risk, and tells you exactly where the advice came from.

“Closest I've had to a coach checking in with me every day.”
— PIRX Beta Tester

Peak for race day

Train withconfidence.Perform atyour peak.

Base. Build. Peak. PIRX guides you through each phase with a daily readiness score and pace-driven workouts — so you arrive at the start line knowing exactly what you're capable of.

“I dropped 22 seconds off my 5K pace and I'm feeling better than ever.”
— PIRX Beta Tester

Start your 14 day free trial

Race-day readinessScored 0–100, every day

Intelligent training