How do I pair Cardiio with RunKeeper?

  1. Launch the Cardiio app, go to "Settings" and scroll down to "Options" and you'll see the button for RunKeeper (it should say "Not configured" unless you're already connected).
  2. Tap on the RunKeeper button and enter your account details to login.
    ** Note: Don't login via Facebook! In the current release there is an issue with the RunKeeper Facebook login. As a workaround, simply use the email address registered with your Facebook account, along with your RunKeeper password to login instead.
  3. Grant Cardiio permission to be paired with your RunKeeper account. The RunKeeper button should now say "Authorized".
  4. You're all set. Now your heart rate measurements will be automatically posted to your RunKeeper feed!

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Does Cardiio work on the iPad?

Yes! Cardiio is a universal app and is fully optimized on all iPads with a front-facing camera.

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Does Cardiio work on the iPod Touch?

Yes! Although Cardiio was designed primarily for dual-core iOS devices, it will still run on single-core devices with a front-facing camera (iPhone 4, iPod Touch 4G). Performance may be less robust and therefore you'll need to pay extra attention and follow these tips [link] to ensure accuracy.

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Does Cardiio work on people with dark skin?

Yes! Our studies have included people of different skin color. The algorithm looks for small transient changes in color due to blood volume changes, not at the overall skin color. However, always pay attention to the following tips [link] to ensure accuracy.

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How can I ensure measurement accuracy?

Here are some very important tips:


• 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.


• If you're using an iPhone, 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.


• Look ahead and hold the phone in front of you (approximately 6 inches or the length of your palm) instead of looking down at the phone - this allows more light to illuminate your face.


• Hold your iPhone/iPad steady and keep still during the measurement.


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Why can't Cardiio detect my face?

Sometimes it takes some experimenting to learn the best way and distance to hold your iPhone/iPad. Here are some important tips:


• Be in a well-lit area so your face is well and evenly illuminated.


• Make sure your face is clearly visible (e.g. no long hair covering your forehead etc.).


• Don’t have a bright background behind you (backlight) - it makes your face appear dark in contrast.


• Hold your iPhone/iPad approximately 6 inches (around the length of your palm) from your face to fill the entire red circle.


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Why does Cardiio always give me a reading of 112 bpm?

There appears to be a mysterious, albeit rare bug in which the Cardiio app always gives a measurement of 112 bpm. We’re looking into this issue, but in the meantime, here’s a simple fix:


• Delete the app (Hold down the Cardiio icon until it starts to wiggle and then press the X that appears on the top left corner. Press the Home button when you’re done)


• Power down your iPhone/iPad.


• Restart your iPhone/iPad.


• Reinstall the app from the App Store.


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Why do my heart rate numbers change over the duration of a single measurement?

There are a couple of possibilities:


• The time interval between each heartbeat varies. This is completely normal and is known as heart rate variability.


• If you just completed some vigorous activity, your heart rate will change as it recovers to your baseline.


• If the initial heart rate estimates are incorrect, the app will continuously update the number as accuracy improves. The final number at the end of the measurement should be the most accurate.


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My question doesn't appear on this list. What should I do?

Please send us an email: info [at] cardiio.com and we'll be glad to help.

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How do I receive the latest news and updates from Cardiio?

To stay up-to-date, follow us on Twitter or Like us on Facebook!

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