ABOUT US2022-07-13T09:20:03+02:00

cosinuss° – the vital sign company

About us - Headquater in Munich

About us

Support healthcare without limits in time and location.

Who we are

Cosinuss GmbH is a certified medical technology company based in Munich that specializes in mobile, real-time monitoring of all vital parameters. For this purpose, the highly innovative team develops its own in-ear sensors, mini-computers, algorithms and software.

More than 12 years of research and development provide a solid foundation of the company. Numerous patents and medically-certified products make cosinuss° a pioneer in the mobile monitoring area.

Core applications include digital healthcare, occupational safety and high-performance sports.

With cosinuss°, the ear becomes a central interface in a world of connected and mobile health.

What drives us

The healthcare industry is facing a major transformation and we want to be a part of it. We are convinced that vital-sign sensors can make a significant contribution to preventative healthcare by improving the diagnosis, treatment and rehabilitation of patients. Our technology can be the heart of a better healthcare system

What we offer

cosinuss° can take vital parameter supervision to a whole new level. Our ergonomic wearables offer a more cost-effective and accurate alternative to the competition for measuring the following:

  • Blood Oxygen Saturation
  • Core Body Temperature
  • Heart Rate
  • Heart Rate Variability
  • Respiratory Rate
  • Position/Acceleration

We process incoming data with smart algorithms, machine learning and pattern recognition to generate customer-defined results. Secure and flexible data management rounds off our comprehensive monitoring solution.

Who we work for

We have our roots in the field of professional sports, but are now increasingly working with customers and partners from the healthcare and occupational safety sectors.


Quality and Safety of cosinuss° products

The development, manufacturing and distribution of medical devices requires a specific company structure that enables the quality and safety of the product to be met in accordance with the regulatory requirements for medical products. The specific requirements for a Quality Management System are specified by the European Directives for Medical Devices (MDD, MDR) through the harmonized standard EN ISO 13485:2016.

For this purpose, cosinuss° has defined appropriate internal processes and established an ISO 13485-compliant Quality Management System covering design and development as well as production and distribution of monitoring devices of vital physiological parameters. The Quality Management System is audited regularly by the accredited Notified Body TÜV Süd to proof its functionality according to the harmonized standard EN ISO 13485:2016. The current certificate can be downloaded here: cosinuss-certificate-EN ISO 13485:2016.pdf

Moreover, the ISO certification is also the basis for CE approval for medical products of class IIa. cosinuss° is currently undergoing the conformity assessment procedure according to MDD Annex II without (4).

Data security

cosinuss° servers are all located in Germany and approved for medical use in digital and physical security.

All privacy data processed is located within the EU and subject to the highest privacy regulations (GDPR/DSGVO).


Technology, Research and Development

Greta and Johannes founded cosinuss° in September 2011 based on the findings of the PhD work of Johannes, which focused on developing the first wearable medical devices for home use.

Starting in the field of research and enabling technology, cosinuss° provided in the very beginnings research institutions and companies who care about the health of their customers, with enabling technology.

The first consumer product, cosinuss° One, was introduced to the market in mid 2016. The °One is a performance tracker for professional athletes to balance health and performance, health being the critical driver of performance. Since then, it found its way into professional areas of triathlon, Formula 1 racing, sailing, motorsports, fire fighters and swimming.

Greta Kreuzer, Johannes Kreuzer - cosinuss° Gründer

In 2017, cosinuss° started a successful Kickstarter campaign to launch its second consumer product, degree°. degree° is a smart digital fever assistant that continuously measures core body temperature of the child and helps parents making decisions based on it.

Further solutions and enabling technology is in development/available for:

  • Remote patient monitoring
  • COPD monitoring
  • Home Health solutions
  • mHealth solutions
  • In-clinic patient monitoring

Our Vision

Empowering people to manage their health and fitness at home.

Providing enabling technology for companies who share our vision and developing own complete solutions for selected health issues.


Enabling Individual mHealth Solutions

cosinuss° builds high precision in-ear sensors that continuously capture relevant vital signs in every day life. Because individual vital signs data is the essential component to create individual health insights. Only accurate data can be the basis of that.

Our Team

Getting things done

We are a team of highly motivated electrical engineers, data scientists, designers and marketers who deeply believe in the great potential of the earconnectTM technology of cosinuss° and who are determined to bring this technology to the people.

An experienced medical engineer, father and guitar fanatic on a mission to use his God-given gifts to help others by creating meaningful things.
An entrepreneur by heart, mother and perfectionist. Greta loves to create new things and to manage our innovations on- and offline.

Software & Firmware

A scientist by heart, perfectionist and proud father, Tim uses his brains to bring the sensing ability of our devices to perfection.
ShabnamSoftware Development
Shabnam is a master graduate from Hanover & a software developer, passionate about emerging technologies & IoT developments - especially in health care system. If not programming, you can also find her exploring nature.
ThomasElectrical engineer
Thomas is an electrical engineer, fitness lover and pizza and noodles stasher. From South Tyrol, not Italy!
FelixSoftware Development
Felix studied medical physics, has work experience in hearing aid development and is now developing software with Python. He is a bit addicted to Indian curry and making music.
SophieSoftware Development
Sophie takes care of studies, data analysis & software. She is always enthusiastic about new ideas in the field of sustainability, books, live music & licorice. Claims to come to the office by bicycle, but sometimes secretly takes the subway.
NikolaiSoftware Development
Nikolai is a software engineer and takes care of the development in Python and JavaScript. When he's not programming, he works passionately on his rock star career as a drummer.
NicholasEmbedded Engineering
Nicholas studies mechatronics at TUM and supports cosinuss° in firmware development. He also works with IoT and microcontrollers in his free time, but in winter he is more likely to be found on the slopes.
OsamaApp Development
After his studies in Computer Science & Engineering (Cairo), Osama is now completing his studies in Informatics (Munich) and developing apps. He likes football, swimming, international cuisine & enjoying sunny days in the Alpes.

Hardware & Construction

A passionate electrical engineer with lots of experience that he uses to constantly improve products. Leo is also father, tea drinker and an archer.
DavidProject Engineer
David not only takes care of our prototypes as project engineer, but also of his ultimate frisbee career and climbing the Alps.
EmadElectrical Engineer
Coming soon
SophieInternship medical technology
A native of Stuttgart, she is currently completing her master's degree in medical technology and supports us in both the hardware team and quality management. When she's not playing soccer, you can find her either cooking vegan recipes or out in nature.

Data Analysis & Algorithmics

AxelData engineer
Axel left Siemens to work for cosinuss°. A Basketball player/trainer at heart, he loves to work in the field of sports & health.
MichaelData engineer
From CERN to Cosinuss°, Michael is a trained particle physicist with a passion for big data analysis and measurements. And happy to be back in Munich close to all his favorite spots: Isar, Theresienwiese, and Untergiesing.
ClaraData engineer
As working student Clara is responsible for accelerometer analysis & data validation. Her passions are music, concerts and photography. Her refuge is the (mediterranean) sea.
RalfElectrical Engineer
As an electrical engineer, Ralf focuses on medical technology and is currently writing his master's thesis on "Non-invasive blood pressure assessment". He likes to spend his free time bouldering or watching good movies.
FionaElectrical Engineering
Fiona is studying electrical engineering (TUM) with a focus on bioengineering and life science. The sports enthusiast is happy that her master's thesis combines sports, medicine and technology. She likes to spend her free time on the tennis court and in the mountains.
DavidSports science
David is a sports science and exercise student who went from playing with balls to having fun with ear sensors at cosinuss°. He loves to go out of tune when singing.

Quality Management & Certification

ZinaidaQuality Management & Regulatory Affairs
As quality manager, Zinaida is responsible for the implementation, regular control & compliance with medical approvals. For recreation, she likes to spend her spare time with her family, out in the sun or travelling.
RalphMedical engineer
Ralph is responsible for ensuring compliance with quality management processes and regulatory affairs for medical wearables. The hobby triathlete loves sports as much as he loves good food.


Birgit is a specialist assistant in tax and business consulting professions with advanced training in balance sheet accounting. Her innovative and versatile interest puts the figures into the right perspective. If not with the numbers or in the mountains you can find her on the yoga mat or teaching yoga.

Business Development & Research

IncinurBusiness Development
Experimental scientist by training, insatiably curious by nature. Inci loves endurance sports, good coffee and innovative technologies that offer meaningful solutions for health. Now focusing her energy to foster B2B business growth.
KatharinaProject Manager
As a well-traveled tourism manager and bartender, Kathi brings dynamic drive to the company. She loves to spend her free time in the mountains and at the Isar with her little animal welfare dog Pixi.

Marketing & Design

GerritDesign and Marketing
The Design Guru himself, creating awesome things. Great design, art, food and ease are his passion.
MelanieOnline Marketing
As M.A. communication science and online marketing expert Melanie takes care of our website. When she's not picking lettuce from her own greenhouse, you can probably find her either at the sewing machine or jogging.
NicolasHealth Management
Nicolas has a business background and is currently a public health master student (LMU, Munich). A health enthusiast, both in his private and professional life, sees technology as an opportunity to improve overall fitness and health in the population.
TeresaClinical research
Teresa is studying human medicine at the LMU. She also has a background in business administration and health economics (M.Sc.). She loves to spend her free time in the countryside with her dog Heidi. In the summer, you rarely see her on dry land, as she is a real water rat.

Job Offerings

Working Students

We like you to assist us developing a next generation of mobile health wearables.

Upcoming Events


We developed a new patented and medically recognized technology using unique algorithms and engineering. Our technology is already in use for wearables in professional sports, medical industry and work safety.


We are working with world-class universities, respected medical centers and health-tech designers to develop the very best in-ear monitoring technology. The cosinuss° technology is already in use in preemptive pediatric clinics, during heart surgeries, in Allied Health Centers and Body Temperature and Fluid Labs.

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