PacerX icon Running · Insights · iOS

PacerX

See more in every run.

Privacy-first running insights for athletes and coaches. PacerX turns your Apple Watch and HealthKit run data into clear, useful signal — so you can understand training beyond surface-level stats and make smarter decisions, run after run.

Download on the App Store How it works
iOS 17+iPhone & Watch HealthKitReads your runs On-devicePrivate by design
PacerX trends screen
PacerX vault screen

Better insights.
Smarter training.

PacerX won't replace your coach — it makes the conversation sharper. The details your watch captures become the insights your training deserves.

Turn run data into coaching intelligence Built for runners · Useful for coaches Beyond the splits
What PacerX sees

Every run, understood
beyond the splits.

PacerX reads the data already on your wrist and turns it into context you can act on — pace, heart rate, effort, conditions and the long arc of your training.

Pace · Heart rate · Effort

Read the effort,
not just the time.

A 7:40 mile uphill into a headwind isn't the same as one on a flat track — and PacerX knows it. Every run is scored against your own history so you can see when you were truly working and when you were cruising.

  • Pace in contextSplits weighed against grade, history and conditions — not just the clock.
  • Heart rate zonesTime-in-zone and drift, so you can tell aerobic base from redline.
  • Effort & loadA single read on how hard the run really was, and what it cost you.
PacerX trends screen
PacerX vault screen
Weather · Elevation

Conditions,
not excuses.

Heat, humidity, wind and hills quietly shape every result. PacerX layers the weather and elevation of each run on top of your numbers, so a tough day reads as a tough day — and progress shows up even when the finish time doesn't.

  • Weather contextTemperature, humidity and wind captured for every run, automatically.
  • Elevation & gradeClimb-adjusted pace that rewards the work the hills demanded.
PacerX trends screen
PacerX vault screen
Seven signals, one picture
01

Pace

Splits read against grade, history and the day's conditions.

02

Heart rate

Zones, drift and recovery curves pulled straight from your watch.

03

Effort

One honest score for how hard the run actually was.

04

Weather

Heat, humidity and wind logged for every session automatically.

05

Elevation

Climb-adjusted pace that credits the hills you ran.

06

Consistency

The week-over-week rhythm that actually builds fitness.

07

Recovery context

How today's run sits against your recent load and rest.

For runners

Train with intent.

See what's working, catch the patterns early, and walk into every session knowing exactly what the last one asked of you.

For coaches

Coach with clarity.

Get the context behind the numbers — effort, conditions and consistency — so your feedback is grounded in what really happened on the road.

Privacy-first

Your runs stay on your phone.

PacerX reads your runs through HealthKit and works on device. No accounts to create, nothing uploaded to a server, nothing sold. The insight lives where your data does — with you.

On-device HealthKit, read-only No accounts No tracking No ads
PacerX

See more in every run.

Privacy-first running insights for runners and coaches. Free to download — bring your Apple Watch runs and start understanding your training today.

Download on the App Store Talk to the studio