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The Smokerlyzer® app is an aid to help people stop smoking, one breath at a time.

Stopping smoking is hard and you can often feel less healthy during your attempt, but with Smokerlyzer® you can instantly see the level of poisonous Carbon Monoxide (CO) leaving your body with a single breath.

Whether you are attempting to quit smoking for good, simply cut back or motivate a loved one, monitoring CO levels with the Smokerlyzer® app will help you accurately track and manage your smoking throughout the quitting process so that you can set and achieve attainable goals. You’ll use it very much like you would use a set of scales if you were trying to lose weight. The less you smoke, the lower your reading, the healthier you are!

Share your results – Email your results daily to friends/family/health professionals who can help motivate you to stay on track in your attempt to stop smoking.

Track your progress – our simple graph will help you track your progress over time, your aim is to get into the green and stay there.

CO breath monitoring is a proven motivational aid that has been helping people to stop smoking for over 30 years.

For best results, we recommend using the app with the iCO™ Smokerlyzer®; the world’s first Smokerlyzer® breath CO monitor for use with your Smartphone. This is purchased separately.

Quit smoking successfully today!

What’s New

Version 1.05

This app has been updated by Apple to use the latest Apple signing certificate.

Compatibility with systems operating up to and above iOS 8.
Dependencies text has been changed to Non-Smoker, Light Smoker, Moderate Smoker and Heavy Smoker.
Interpretation text has been changed.

App Privacy

The developer, Bedfont Scientific, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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