Cardiio: Heart Rate Monitor

Name: Cardiio: Heart Rate Monitor
Rating: 4.7 (58433 reviews)
Author: Cardiio, Inc.

By: Cardiio, Inc. App

HR checker & beat analyzer

Overview

Version:

4.1.7

Last updated: 2026-06-26

Features & Capabilities

Cardiio: Heart Rate Monitor turns your iPhone into a health-tracking tool. Instantly measure heart rate and blood oxygen with the camera, track daily/weekly/monthly trends, and power quick 7-minute workouts. Export your data and sync with Apple Health for seamless insight.

Cardiio PRO adds in-depth pulse waveform analysis, blood pressure estimates, calorie burn estimates, and personalized health comparisons. Note: Not medical advice; consult a professional for health concerns.

User Growth & Download Statistics

App Sports Data Privacy & Security

By:

Cardiio, Inc.

Rating:

4.70

(58,433) 6 new ratings

Version:

4.1.7 Last updated: 2026-06-26

Version code:

886991884

Creation date:

2012-08-09

Compatible devices:

Size:

100.72MB

URLs:

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-09-18

Compare stats and ranking:

Ranking

# 5,566 ▼ 12

Other rankings

#10 in heart keyword 8 #86 in rating keyword 14 ▼ 4

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.

Developed by:

Cardiio, Inc.

Apple Apps Store

https://apps.apple.com/us/app/cardiio-heart-rate-monitor/id542891434

User Reviews

Users overall see value in Cardiio for on-the-go heart-rate monitoring and peace of mind, especially for heart conditions. However, the app is plagued by reliability issues (poor signal quality, frequent failed readings), device compatibility problems with newer iPhones, and troubling billing/support experiences. Stability and connectivity problems further detract from the experience. The strongest positives center on convenience and potential safety benefits; the strongest negatives center on inconsistent performance and billing woes.

Pros

Convenient to check heart rate anywhere without needing a smartwatch
Quick and simple pulse checks, easy to use anywhere
Helps monitor heart rate and can provide warnings for abnormal values (beneficial for heart conditions)
Can offer peace of mind and even calmness during stress or overwhelm

Cons

Readings are frequently unreliable and require stillness; poor signal quality often prevents registration
Multiple reports of needing many attempts (8–10 tries) to get a reading
Compatibility issues with newer iPhone models (e.g., iPhone 17 Pro Max) causing poor signal or failures
Billing and subscription problems (free trial charges, unexpected charges, and perceived unresponsive support)
App instability/crashes (e.g., crashes in insight tab or when saving a heartbeat) and connectivity issues with other devices

Recent reviews

Unbelievable how accurate this is. I do this about once per week and show the results to my dr. Gives me peace of mind.

by bo*****, 2026-08-30

I use this app to track my waking heart rate and the times when I exercise. Most of the time, it’s easy to use and to get an accurate reading. Sometimes, it can read that my finger is blocking the camera lens, but it won’t give me an accurate reading. Other times it has difficulty locking onto my finger at all. So, mixed review.