Lumen

Breathing Life into Lumen

Connecting CO2, metabolism and wellness for elevated insights

Insight with every breath

Lumen’s mission is to empower users to improve their health and widen consumer access to personalized nutrition. They do this by deploying cutting-edge technology that exists at the intersection of our physical and digital worlds.

A growing number of consumers are seeking insights into the impact that daily activities and diet have on their wellbeing. Lumen saw the need for improved access to metabolic monitoring as key to determining how sleep, physical activity and nutrition are affecting health. Lumen believed that if people had a way to monitor and improve metabolic health, they could better influence their health outcomes.

To deliver their big idea, the Israeli startup partnered with frog. Together, they got to work creating a device that could track a user’s metabolism and deliver health insights. frog helped Lumen develop the device, activate user progress scoring and enable rapid push real-time data to the user. Underlying all of this was a commitment to providing a smooth and accessible user experience.

The result was an innovative, portable and handheld device that can determine your body‚Äôs CO2 concentration‚ÄĒan indicator of the kind of fuel your body is using to produce energy‚ÄĒin a single breath.

Working with the frog team to bring Lumen to life has been an exceptional experience. Their passion towards building and creating new product is unparalleled. We were continuously impressed by their thinking process, creative, consumer-centric design and team work.

Dror Cedar, Founder and Chief Growth Officer, Lumen

  • Breathing fresh air into health tech¬†

    Project highlights

  • Challenge

    From concept to prototype

    To support their hypothesis for a fast and accessible method for gathering real-time metabolic data, Lumen needed an articulated UX concept as well as component architecture, refined product concepts, a cohesive design language and volume layouts. 

  • Solution

    A venture design approach

    frog developed a User-Centered Framework and Design Research ‚ÄúBootcamp‚ÄĚ curriculum to aid the Lumen team in learning to systematically evaluate product concepts directly with target users. The insights generated by user research guided selection of a final product concept for Lumen.¬†
    Luxury in the details
    frog helped refine Lumen into a premium luxury object, designing details like lit graphics to visualize the analysis process, as well as a magnetic chrome cap to protect the air inlet and communicate product quality. Detailed engineering supported the development of working prototypes that were used to test the Lumen experience with beta users. 

  • Outcomes

    Vision delivered

    At the end of the Lumen program, frog delivered an appearance model with final materials, a mechanical prototype to test the product assembly and design guidelines to inform the supplier for production. Since the launch, frog continues to support Lumen’s evolution, leveraging Behavioral and Experience Design to maximize engagement and health outcomes.

Lumen partnered with frog to create a device that could track a user’s metabolism and deliver health insights.

Underlying all of this was a commitment to providing a smooth and accessible user experience.

frog helped Lumen develop the device, activate user progress scoring and enable rapid push real-time data to the user.

The result was an innovative and portable way to determine your body’s CO2 concentration in a single breath.

frog helped refine Lumen into a luxury object, with premium details such as illuminated graphics and a magnetic chrome cap.

frog helped refine Lumen into a luxury object, with premium details such as illuminated graphics and a magnetic chrome cap.

Detailed engineering supported the development of working prototypes that were used to test the Lumen experience with beta users.

Peer reviewed and published

Before Lumen, the only way to measure metabolism was in a hospital or clinic with a costly and time-consuming test known as respiratory exchange ratio (RER).  


Lumen have been peer-reviewed and published in the Interactive Journal of Medical Research (I-JMR). The study by San Francisco State University validated Lumen’s ability to provide real-time metabolic information for users under any circumstances on a par with equivalent laboratory tests. By taking the tech out of the lab and placing it into the hands of wellness devotees worldwide, Lumen succeeded in widening access to crucial health insights.   

frog is unmatched in the industry for our ability to bring a collage of contingent capabilities to our clients, and we’re proud to lead the way when it comes to bringing to market intelligent products and service ecosystems. 

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