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Unlock the data in your breath

Calibre® is on a mission to democratize access to respiratory and metabolic data. By revolutionizing breath measurement through our affordable, ultralight wearable device, we believe we can make respiratory data available to millions with applications for fitness training, wellness, and eventually a wide variety of medical uses. Our product has recently been launched and is now shipping to customers.

This Reg CF offering is made available through StartEngine Capital, LLC. This investment is speculative, illiquid, and involves a high degree of risk, including the possible loss of your entire investment.

$70,272.44 Raised

Reasons to Invest

  • Differentiated and protected technology - Calibre provides scalable access to accurate and informative respiratory data that was previously only available in labs or hospitals. This is achieved with an innovative, wearable product that can be used by anyone, enabled by revolutionary technology that is protected by multiple patents.
  • Early move in greenfield space - We believe Calibre to be one of the first to bring breath-based wearables to the consumer market in a scalable way - democratizing access to respiratory data,  and in doing so establishing an entirely new - and very large - space in the digital health data market.
  • Remarkable upside opportunity - Calibre’s founding team has successfully taken the product through development, manufacturing, and beta testing - and is now shipping regularly to customers - all on a relatively shoestring budget, allowing Calibre to offer a ground-floor investment opportunity with enormous upside.


The future of respiratory data is Calibre

Respiratory data has been enormously interesting to medical science but out of reach for most people. At Calibre, we aim to provide an accessible way for anyone to track and collect this data whenever and wherever they would like to. The implications are groundbreaking and amazing.

Combining established respiratory science with breakthrough technology, we believe Calibre empowers users to take charge of their metabolism, respiratory wellness, and much more.

Through our game-changing design and technology, Calibre enables respiratory data access to anyone, simply, on a cloud-enabled app. In other words, we are unlocking a hidden trove of personal metabolic and physiological data for millions.

THE Problem & OUR solution

Biometrics of human breath have been appreciated for over a century, but the data has been out of reach for most people

Breath data has been historically only accessible for professional use in laboratory settings, utilizing expensive, cumbersome, complex equipment.

Calibre solves all these issues, thereby unleashing a whole new market. 

Proven science shows all our calories are “burned” using oxygen and producing CO2 - that’s breath! Calibre makes this established insight available to everybody - accurately tracking calories used per minute by measuring the oxygen and C02 in exhaled breath. It can even distinguish fat burn from carb burn, isn’t that cool? And perhaps most remarkable, this works in any activity and for any body type. All on your phone, anytime you want.

We are aware that respiratory monitoring machines have been available for years, but they can cost from $10k upwards to $100k - where at Calibre our device is under $400 and usable anywhere. Currently, we are engaged in a B2C model that provides 1:1 sales; however, it is our goal to also offer our products at a large scale through  institutions, sports programs, and various partnerships.

Act 2 - Medical Use

Calibre provides an easy way for breath data to be collected securely in real-time to the cloud. As such, we feel Calibre can become extremely beneficial in medical and clinical settings in the not-too-distant future. Calibre could provide caregivers remote patient monitoring capabilities for a range of conditions and purposes ranging from pulmonary and cardiovascular health to sleep and neurological issues. We also believe that Calibre can be a powerful tool for clinical research on a new scale, in terms of what and how participants, can be studied using Calibre devices. At the moment Calibre is not an FDA-approved medical device, but we are planning to apply for FDA clearance in the near future.

The market & Our Traction

The wearables market was valued at more than $100 Billion in 2021we believe Calibre is positioned to be an industry leader in its sector 

In this expanding market, we feel there has been a glaring absence of products to monitor and track respiratory data. Calibre's technology has the potential to fill that gap and offer key insights through the data collected.

The global wearable technology market size is projected to grow at a compound annual growth rate of 13.89% to reach around $392.4 Billion during the forecast period of 2022 to 2030 (source), and wearable devices specifically in consumer applications could skyrocket up to $212.67 Billion by 2029 (source).

Calibre aims to be an industry leader in these growing markets, and we believe we have made significant headway towards that goal. In anticipation of such potential, we have filed multiple patents (8 pending, one already issued).

Here’s a look at more of our traction...


Calibre is on a mission to expand and make respiratory data more accessible for all

We feel that Calibre is poised to disrupt the wearables and digital health market, and believe that our technology's application can expand tremendously with the financial support we need to get there.

Our longer-term vision is to “get serious” about the medical opportunities - moving towards FDA certification, hiring the right experts, and, above all, engaging the medical community.

Calibre is bringing something unique, novel, affordable, and accessible to the market - we believe everyone can have access to their respiratory data through user-friendly wearable technology. Join in on the mission and invest today!

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35 Walnut Street, Suite 100
Wellesley Hills, MA 02481

Calibre® is on a mission to democratize access to respiratory and metabolic data. By revolutionizing breath measurement through our affordable, ultralight wearable device, we believe we can make respiratory data available to millions with applications for fitness training, wellness, and eventually a wide variety of medical uses. Our product has recently been launched and is now shipping to customers.


Udi Meirav
Udi Meirav
CEO and Founder

Calibre is the brainchild of Udi Meirav, a prolific inventor and seasoned startup CEO. Starting his career as a PhD Physicist from MIT - specializing in semiconductors - Udi evolved as a tech entrepreneur and executive, leading several startups that have brought complex, novel products to market. One of his recent companies developed air cleaning technology that reduces the amount of energy required for air conditioning, now installed in buildings around the world. He has dozens of patents to his name. Several years ago he became fascinated with the biometric significance of breath and the potential of wearable breath sensors, an idea that eventually evolved into the metabolic tracker called Calibre, which is his current passion. Udi and his wife Megan have 6 children and live near Boston.

Raviv Shefet

Raviv Shefet

Chief Financial Officer

Raviv is a seasoned financial exective with 25 years’ experience in U.S. and international financial and operations management, spanning the gamut from early stage venture-capital backed startups to mature, profitable businesses and publicly traded companies. His track record as CFO includes technology companies in software and hardware, among them Charidy, 33Across, WebCollage, DVTel and Selway Partners (SCP).

David Ierardi

David Ierardi

Chief Operating Officer

Dave brings over 30 years of product development and manufacturing scale-up experience in a multitude of industries including telecommunications, consumer electronics, military electronics, fuel cell technology and battery materials. He has a strong track record working at the highest levels of numerous organization in manufacturing and engineering leadership. With an educational background in mechanical engineering and computer integrated manufacturing, he has operated in a broad number of disciplines including electronics, materials, software and has built and led multidisciplinary teams. Dave has an unmistakeable passion for product development and large scale, high quality production.

Sean Coakley

Sean Coakley

Marketing and Business Development

Sean is a passionate health and technology evangelist with years of experience as a business development executive and strategic partnership leader in the health-tech market. Sean's education background is in epidemiology, biochemistry and nutritional sciences, and his early career was with marketing & reserach powerhouse Gartner. Subsequenty, Sean developed a successful track record in multiple start-ups, from open-source software technologies to the consumer wearable space. Sean is also a former athlete and a globally-known respiratory performance speaker and coach, working with olympians, professional athletic teams and many well-known high performers.    

James Ciriello

James Ciriello


Senior Leader of IT and Digital Transformation • Clear and pragmatic vision of how digitization transforms enterprises and industries • Extensive experience in navigating complex organizations and partnerships to accelerate and scale innovation • Turns data and information flows into assets • Translates strategy into action for large-scale business change • Published, recognized for shaping perspective on business and technology


Calibre Biometrics
Mar 21, 2023
$15k - $1.24M
Class A Common Stock

Maximum Number of Shares Offered subject to adjustment for bonus shares

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*Maximum number of shares offered subject to adjustment for bonus shares. See Bonus info below.

Investment Incentives and Bonuses*


Friends and Family Early Birds

Invest within the first 96 hours and receive 20% bonus shares.

Super Early Bird Bonus

Invest within the first week and receive 15% bonus shares.

Early Bird Bonus

Invest within the first three weeks and receive 10% bonus shares.


$1000 + / Supporter

Invest $1,000 and receive 2% Bonus Shares.

$2,500+ | VIP

Invest $2,500 + and receive 5% Bonus Shares.

$5,000 + | VIP + 10 % Bonus Shares

Invest $5,000+ and receive 10 % Bonus Shares, Free product.


$10,000+ | VIP Gold

Invest $10,000+ and receive 15% Bonus Shares, Free product, coaching session with Sean (Co-Founder/Master Instructor).


$25,000+ | VIP Platinum

Invest $25,000+ and receive 20% Bonus Shares + Private zoom call with Chief Executive Officer, Free product, coaching session with Sean (Co-Founder/Master Instructor).  

*In order to receive perks from an investment, one must submit a single investment in the same offering that meets the minimum perk requirement. Bonus shares from perks will not be granted if an investor submits multiple investments that, when combined, meet the perk requirement. All perks occur when the offering is completed.

The 10% StartEngine Owners' Bonus

Calibre Biometrics Inc. will offer 10% additional bonus shares for all investments that are committed by investors that are eligible for the StartEngine Crowdfunding Inc. OWNer's bonus.

This means eligible StartEngine shareholders will receive a 10% bonus for any shares they purchase in this offering. For example, if you buy 100 shares of Class A Common Stock at $2.50 / share, you will receive 110 shares of Class A Common Stock, meaning you'll own 110 shares for $250. Fractional shares will not be distributed and share bonuses will be determined by rounding down to the nearest whole share.

This 10% Bonus is only valid during the investors eligibility period. Investors eligible for this bonus will also have priority if they are on a waitlist to invest and the company surpasses its maximum funding goal. They will have the first opportunity to invest should room in the offering become available if prior investments are canceled or fail.

Investors will receive the highest single bonus they are eligible for among the bonuses based on the amount invested and time of offering elapsed (if any). Eligible investors will also receive the Owner’s Bonus in addition to the aforementioned bonus.

Irregular Use of Proceeds

The Company might incur Irregular Use of Proceeds that may include but are not limited to the following over $10,000: Vendor payments.


Owners bonus
Stack Owner's Bonus & Rewards!

Members get an extra 10% shares in addition to rewards below!


Multiple investments in an offering cannot be combined to qualify for a larger campaign perk. Get rewarded for investing more into Calibre Biometrics.



Ronnie Jaikaran

6 months ago

Hello, Do you need to send me any tax documents for filing taxes? I'm new to start-up investing.



Kevin Fulmer

7 months ago

Hi Udi - I can't respond to your comment directly for some reason, but send me an email at



Kevin Fulmer

7 months ago

Hi Udi - following up on my below questions.



Khaleedow Bright

8 months ago

Hello, I'm Khaleedow, an expert in fundraising. I came across your campaign and see that it is not getting enough investments because it is missing out on a crucial component which is Organic promotion. I can help you promote your campaign organically and make it reach real and active investors who will be interested and willing to invest in your campaign. You can reach me out or contact me through this link below https//



Kevin Rivera

8 months ago

Can you please share some revenue goals for the next 5 years?



Kevin Fulmer

8 months ago

Hi Udi - this looks like a super interesting concept! I have a few questions before deciding to invest: 1. What are the metrics that this can track that the Apple Watch cannot? 2. Can you connect your data to your apple watch? 3. Who is the main customer for this, fitness junkies or older people monitoring respiratory issues? 4. Can you explain the compensation of your CEO? It says he is paid $280k/year, but that he is just accruing that amount and not extracting actual cash from the business right now. 5. What is your monthly cash burn? 6. How much do these cost to produce, and what is your profit margin? 7. Who are your direct competitors that are also selling a breath-tracking device? 8. How many orders have you received thus far?




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