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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 health, 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
• Calculate 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 [*PRO]

GET HEALTHIER, improve your fitness and endurance:
• 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]
• Know how many calories you've burned by simply measuring your active heart rate after any 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. The measurement principles are the same as clinical pulse oximeters. 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.

Studies have shown that our heart rate measurements are within 3 bpm of a clinical pulse oximeter when performed at rest in a well-lit environment (Poh et al., Optics Express 2010, Poh et al., IEEE Trans Biomed Eng 2011).

• 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..."

Although accurate when used properly, 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.

What's New in Version 3.2.1

1. Today Widget (iOS 8+)
Use Cardiio’s today widget to see your most recent measurements, measure your heart rate, or start a workout! To enable it, open the Notification Center by swiping down from the top of the screen, tap ‘Edit’ at the very bottom, and enable ‘Cardiio’.

2. Earn Real Rewards
Win prizes and earn tangible rewards when you consistently track your heart rate or complete workouts (Note: Apple is not a sponsor of any promotion).

3. Pump it Up!
Now you can perform our 7 minute workout to your favorite music. Simply start playing your jam, then launch the workout!

4. Bug fixes
-Fixed crash in iOS 6 devices.
-Fixed loss of audio in 7 min workout.


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Customer Reviews

Cardio App Review

I downloaded this app to help me monitor my heart rate. It seems easy to use and pretty accurate. The only issue is that you have to remove your IPhone from its case to get an accurate reading. The added distance between the camera lens (which is what the app uses to read your pulse) seems less accurate than when the lens is in direct contact to your finger tip. Using the camera to look at your face to record your heart rate seems very inaccurate but I was in a darker room. May require further testing to validate. Wave display of your heart, if accurate, is a nice feature. I think the results of heart monitoring will be made available for study with other users, which can be very useful and valuable for public health research. Neat app overall

Works well

Works great measuring resting heart rate! It is surprisingly accurate merely scanning the face. There is also good information on analysis and even a suggested short exercise routine.

The only issue I see is that I cannot figure out how to measure my active heart rate with the app since the scan takes a fair amount of time. This is not really a problem for me as I have a wearable monitor for exercise. This allows me to measure my resting heart rate far more conveniently during the day.

The only suggestion I would have is to allow the input of active heart rate manually for record keeping and analysis.

Great App for IPhone

Shares data with the health box on the iPhone to help you keep track of resting and active heart rates along with sharing with the "Lose It" app. All 3 work great together to help you keep track of food, Weightloss, exercise, heart rates, and much more!! Awesome for keeping fit!! The face scan is always more accurate, but requires light as a heads up. Not sure how, but it's scarily accurate lol!! I love this app bc it's helping me keep fit and reminds me to put in my scan first thing in the morning, which makes me want to know what my heart rate is after activity of any kind lol!!

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: 3.2.1
  • Size: 33.2 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 6.1 or later. Compatible with iPhone 4, iPhone 4S, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPad, and iPod touch. This app is optimized for iPhone 5.

Customer Ratings

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Top In-App Purchases

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