Pace Radar: Running Heart Rate

See your aerobic fitness improve week by week. Pace Radar tracks heart rate at every pace — one glance shows if your training is working. No subscriptions, yours forever.

Pace Radar reveals what other running apps miss: how your heart responds to the same pace over time. A downward trend means real aerobic progress — not just faster splits.

YOUR HEART TELLS THE REAL STORY

Every run is parsed second-by-second. Pace Radar aligns your heart rate and pace data on a precision grid, groups them into pace buckets, and plots weekly trends. Watch your heart rate drop at the same effort — that's fitness you can see.

• Trend charts that show heart rate by pace bucket, week by week • Configurable pace buckets (15s to 90s width) for your training style • Rolling averages that smooth noise and reveal real progress • Time ranges from 1 week to 5 years of training history

EVERY RUN, ANALYZED

Tap any workout for a full breakdown:

• Dual-axis chart: pace and heart rate over time, side by side • Per-kilometer splits with pace bars and heart rate • Cardiac decoupling analysis — see if your heart rate drifts during long runs • Actionable insight cards that explain what the numbers mean

GRADE-ADJUSTED PACE

Hills don't lie, but flat pace does. Pace Radar adjusts your pace for elevation changes using the Minetti metabolic cost model, so your trend data reflects true effort — not just terrain.

EFFICIENCY FACTOR

For Apple Watch runners with power data: track your Power-to-HR ratio over time. A rising efficiency factor means you're producing more speed per heartbeat.

CARDIAC DECOUPLING

The metric elite coaches use. Pace Radar compares your heart rate in the first and second half of each run. Under 5%? Strong aerobic base. Over 10%? Time to dial it back. Color-coded status on every workout and in your trend summary.

PERSONALIZED INSIGHTS

Pace Radar reads your training patterns and generates specific observations: "Your heart rate at 5:30 pace has dropped 4 bpm in 12 weeks." Real data, not generic tips.

SHARE & COMPARE

Export your entire workout history as a compressed .pacebeat file. Send it to your coach, compare with a training partner, or back up your data. Import any .pacebeat file to view someone else's trends — without overwriting your own.

BUILT FOR RUNNERS WHO PAY ATTENTION

• Dark theme designed for clarity • Metric and imperial units • Filter runs: Easy, Tempo, Long • Total distance and workout count at a glance • Apple Health integration — reads your existing data

PRO — ONE PURCHASE, YOURS FOREVER

Free users get 4-week trend history and core features. Unlock Pace Radar Pro once for:

• All pace buckets on a single chart • Extended history: 6 months to 5 years • Cardiac decoupling metrics • Efficiency Factor chart • Full per-workout analysis

No subscriptions. No ads. Family Sharing included.

Made for runners who pay attention.

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