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Cardiio - Heart Rate Monitor + 7 Minute Workout Exercise Routine for Cardio Health and Fitness

By Cardiio, Inc.

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Cardiio helps you measure your heart rate, learn how the numbers relate to your general wellness, perform effective workouts to get in shape, and track your progress.
*** Popular Science Top 10 Inventions 2011 *** Featured in the New York Times, BBC, The Doctors (CBS), ABC News and more ***

The Cardiio app turns your iPhone or iPad into a heart rate monitor!

• Just hold your phone or tablet in front of you, or
• Simply cover the rear camera with your finger to read your pulse in seconds

GAIN INSIGHT into what your heart rate numbers mean:
• Get a fitness level rating based on your heart rate
• Estimate your endurance score (VO2 max)
• See how your heart rate stacks up to people from other countries and famous athletes
• Obtain a gender- and age- specific heart rate analysis [*PRO]
• Estimate your potential life expectancy (for entertainment purposes only) [*PRO]

IMPROVE YOUR FITNESS, endurance, and general wellness:
• Built-in high-intensity circuit training program that only takes 7 minutes to complete, and can be performed anywhere
• 7-minute workout consists of 12 exercises with detailed explanations and audio cues
• Find out your target heart rate range to maximize your workout [*PRO]
• Estimate how many calories you've burned by simply measuring your heart rate after a workout session [*PRO]

• Personal dashboard with history (daily, weekly and monthly)
• Edit, annotate, export your data (CSV)
• Compete with your friends on Facebook to see who's the fittest
• Syncs with Apple Health, RunKeeper
• Share your achievements to Facebook, Twitter.

*UPGRADE to enjoy all the PRO features!

Cardiio’s technology is based on cutting-edge research and science conducted at the MIT Media Lab. Every time your heart beats, more blood rushes through the vessels in your face, causing them to expand. The increase in blood volume absorbs more light, resulting in a decrease in the amount of light reflected from your face. Using sophisticated software, your iPhone's camera can track these tiny variations in light that are invisible to the naked eye to calculate your heart rate.

• Look ahead and hold your phone 6 inches in front of your face
• Be in a well-lit area so your face is well illuminated.
• Make sure your face is clearly visible (e.g. no long hair covering your forehead etc.) so that it can be easily detected.
• Don’t have a bright background behind you (backlight) - it makes your face appear dark in contrast.
• Fold one arm across your chest and rest the other arm that’s holding your phone against it to provide support and reduce motion of the phone during measurement.
• Hold your phone steady and keep still during the measurement.

NEED HELP? If you have difficulty with the app, just contact us:


PC Magazine - "… the app is simple, yet beautiful and pretty slick."

Cult of Mac - "Cardiio is one of those apps that wows you..."

Lifehacker - "it’s a little mind-blowing..."

If pulse rate is critical to your health, you need to have your pulse taken by a medical professional. Cardiio is not intended to diagnose, prevent or treat any condition, or to be a substitute for professional medical care. Measurements and statistics are intended for research, informational and educational purposes only, to support general health and wellness. The Cardiio app has not been cleared or approved by the U.S. Food and Drug Administration.

What's New in Version 3.3.1

-Updated for iOS 9
-Improved finger detection
-Bug fixes


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Customer Reviews

Inimitable I Tell Ya, Sure Is.

Let me begin by saying that this app is efficient, nonpareil, first rate, and completely accurate in every measurement.
This trusty little app lets me check my heart rate in whichever way is convenient to me; by the use of my front camera or by placing my finger on the back camera lens.
Its accuracy is astounding(I am blown away every time I use it). There is also the fact that it graphs all of your numbers to create a type of cardiovascular profile for you; compare and contrast just your numbers or with others to better understand how your health is, or see how you stack up with others worldwide.
If you upgrade to the Pro version, there are tons more superb features, but trust me, you don't even need to upgrade, the free version is in itself absolute high quality.
A little bit about me, having recently been diagnosed with an illness that requires I take a number of stimulants every day, this app has, not exaggerating, saved my life. Having this app/ tool to check my heart at any time I need, in any one place, has allowed me to prevent the need to visit the emergency room various times.
So whether you are looking to better understand your cardiovascular health, or are simply just curious to know what your heart rate(bpm), the CARDIO app is the one for you. Scouts Honor.

Innovative, easy to use

I tried using Cardiio on my iPod touch a few years ago, and thought it was the coolest thing I had ever seen an iOS device do. Then I got an iPhone, and the camera was so much better and so much more accurate that I was again blown away by how easy to use and accurate this app was at measuring your heart rate.

I recently had a medical accident and am in the process of healing, and it is very helpful to be able to record my heart rate throughout the week and report to my doctor. Cardiio and apps like it give me hope that the future will be one of patients being able to record a multitude of biometrics at home instead of having to wait until a doctors visit.

Definitely one of the better heart apps

This app comes with a lot of great features, some free some you have to pay for. I like that you have the choice of using either the finger method, or scanning your face. I compared it to other heart rate measurement devices on exercise machines, as well as fitness bands and it seems to match pretty well. The face scanning technique is good if you want to get a measurement while moving like when you are on a bike, but the finger is best whenever possible. You can add features such as calculating how many calories burned after having whatever your heart rate was for however minutes. You can also choose to share the data with the Apple Health app as well as other apps.

Cardiio - Heart Rate Monitor + 7 Minute Workout Exercise Routine for Cardio Health and Fitness
View in iTunes
This app is designed for both iPhone and iPad
  • Free
  • Category: Health & Fitness
  • Updated:
  • Version: 3.3.1
  • Size: 45.2 MB
  • Languages: English, Dutch, French, German, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Swedish, Traditional Chinese
  • Seller:

Compatibility: Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

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Top In-App Purchases

  1. Full Pro Upgrade!$6.99
  2. Pulse Waveform Pack$3.99
  3. Life Expectancy Pack$2.99
  4. Specific Heart Rate Pack$2.99
  5. Calorie-Burn Monitor$4.99
  6. Target Heart Rate Pack$3.99
  7. Coach Max$0.99
  8. Remove Ads/Rewards$1.99
  9. Coach Nadia$1.99
  10. Coach Emma$0.99