Apps by JOhn Lyons
Cardiogram app icon

Health & Fitness

Cardiogram

JOhn Lyons

$0.99 1.33 · 1 storefront · 6 ratings In-app purchases unconfirmed
Open on Apple

About this app

Track your heart in real time, right from your wrist. This app requires an Apple Watch, and includes the watch app free. This app shows live heart rate with a smooth scrolling graph, along with key cardio signals like energy burn, breathing rate, and variability, designed for clarity at a glance. Built for Apple Watch first, it focuses on continuous monitoring, not workouts. No clutter, no sessions to manage — just instant feedback on how your body is responding moment to moment. An optional iPhone companion mirrors your data on a larger screen. Perfect for casual fitness, stress awareness, or simple curiosity about your heart throughout the day. The app comes with a companion watch app you need to run at the same time.

Latest release

What’s New

Version 3.5 Mar 30, 2026

Made instructions on how to use the Apple Watch companion app. Added better messaging around HealthKit errors.

Audience growth

Ratings growth

Steady
7-day gain +0
Ratings / day 0.0
30-day gain +0
US rating-count history
6 ratings
6 Aug 17, 2026 · 6 ratings Aug 17, 2026

Baseline captured. Growth appears after the crawler observes a changed rating count.

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

Price tracking

Price intelligence

1 captured event
Current $0.99
Historical low USD 0.99
Paid → free
Price history
Current $0.99
$0.99 $0.50 Free Aug 17, 2026 · $0.99 Aug 17, 2026

First snapshot captured. The trend line starts after the next crawler price observation.

  1. First observed Aug 17, 2026 · 6:26 PM $0.99

Screenshots

Cardiogram iPhone screenshotCardiogram iPhone screenshotCardiogram iPhone screenshot Cardiogram iPad screenshot