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Most common questions

What is it?

A breath analysis device for fertility tracking.

Who created it?

The founder of breathe ilo are: Prof. Dr. Ludwig Wildt, a well know
gynecologist and Dr. Ruether a talented technician.

Where can we buy it?

On our Online Shop:

What do we get when we order?

A handheld breath analysis device that works with a smartphone app.

What is the uniqueness of the technology?

The world’s first fertility tracker that works via breath analysis; it is the easiest way to identify the fertile days.

What is the battery life? Hours of continuous use? How to charge?

USB-C, once a month

How does it work?

With simple breathing into the device for 60 seconds a day. The result is shown in the breathe ilo smartphone app.

How does it integrate with other connected devices?

via bluetooth.

Is it waterproof?

The device is spill resistant. The mouth piece is dishwasher safe.

Where is it manufactured?

It is developed and produced in Austria.

Which phones does it work with?

It works with Android (from version 6) and iOS (from version 11)

What can we expect from the app?

The app controls the device and shows a calendar with the fertile days. Also, there is a cycle dairy included where other cycle symptoms can be documented.

Will there be updates available through the app?

Yes, the app will the updated on a regular basis and other features will be available.

How do I set it up?

The device will be paired with the user account through the registration process.

What if the App crashes?

Please switch off and on again.

The app doesn’t connect to the device?

Please control your Bluetooth and Mobile data/WIFI connection.

How secure is it?

The safety meets all standard data security requirements.

What are the recommended ages?

All women between 20 and 45 who would like to track their cycle to get pregnant or simple to get a better feeling for their body.

What certifications do you have?

CE and FC certification.

How is my privacy protected?

The data is protected on our server provider. The data will not be shared with third parties

Is there a limitation in the cycle length?

breathe ilo is tested for cycle lengths between 24 and 35 days. Variations within this range are perfectly normal.

What is the accuracy?

breathe ilo recognizes in average about 5 of 6 fertile days each cycle.

Can I use it for contraception?

No, breathe ilo cannot be used as a contraception method.

Is it working for women show have PCOS?

breathe ilo is not tested for women with PCOS. But we are continuously working to improve the breathe ilo system help also women with PCOS.

What happens if a user misses a day?

The user can miss one day per cycle. Although it is not recommended for best results.

Are there studies on the method?

There are multiple studies published, that show that the CO2 partial pressure is linked to the female cycle. Here are three examples:
1) The biphasic pattern of end-expiratory carbon dioxide pressure:
2) Phasic menstrual cycle effects on the control of breathing in healthy women:
3) Journal for Fertility and Reproduction (only in German available):