Biofeedback Made Simple

Help clients observe what they can't always feel. Biofeedback uses information about physiological activity to help people become more aware of changes occurring in their bodies. During relaxation practice, those changes may not always be immediately noticeable.

Calmstone provides a simple visual representation of changes in hand temperature, giving clients something they can observe while practicing breathing, mindfulness, or other relaxation techniques.

Why Thermal Biofeedback?

Changes in stress and relaxation can influence the autonomic nervous system and peripheral circulation. During sympathetic activation, peripheral blood vessels can constrict, contributing to cooler hands. As arousal decreases, peripheral circulation may increase and skin temperature may rise.

Calmstone uses an infrared temperature sensor to detect changes in palm temperature and translates those changes into visual feedback. As palm temperature changes, Calmstone's visual display progresses through different colors. The feedback gives users a simple way to observe changes while practicing relaxation techniques.

  • Measure

    An infrared sensor monitors palm skin temperature.

  • Visualize

    Temperature changes are represented through Calmstone's light display.

  • Practice

    Clients can observe the feedback while practicing therapist-guided breathing, mindfulness, or relaxation techniques.

  • Great tool for nervous system regulation!

    "I’m incorporating the Calmstone in my therapy practice as a biofeedback and nervous system regulation tool. Clients have enjoyed the live feedback. I’ve also used in couples session to provide feedback on how flooding of the nervous system directly influences our communication and conflict. It’s proven very helpful." - Andrea M.

  • Excellent!

    "Working as a Chartered Physiotherapist in private practice, the device is a non invasive and easily applied method of illustrating the impact of pressure and tension in clients whose situation will benefit from biofeedback." - Robert P.

  • Great!

    "As a chronic pain coach myself I have to say that it is amazing! The visual biofeedback is a really intuitive way to implement calming techniques such as breathwork and see how it affects your nervous system in real time." - Simone H.

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A Simple Tool For Everyday Calm

TRUSTED BY PROFESSIONALS

Featured on MedScape

Calmstone has been used by medical and wellness professionals as a supportive tool for relaxation and biofeedback practices. After being featured by Medscape following the 2023 American College of Lifestyle Medicine Conference, Calmstone gained broader visibility among therapists, wellness professionals, corporate wellness leaders, and other practitioners.

MedScape Article

Biofeedback in Modern Therapy

Biofeedback offers a way to bring physiological awareness into the therapeutic process. Rather than relying solely on how a client describes their experience, therapists can introduce an additional point of reference that helps clients become more curious about their body’s responses.

For therapists exploring mind-body approaches, Calmstone offers an accessible way to introduce biofeedback into practice while building on established techniques and the growing body of research surrounding biofeedback, stress regulation, and behavioral health.

You don't have to change your therapeutic approach. Calmstone can simply provide another source of feedback during practices you're already using.

Making Wellness Accessible & Affordable

Founded by Dr. Franklin Ly in 2023, Calmstone's foundation is rooted in wellness. His mission was established from a desire to make biofeedback technology accessible and affordable for everyone. Dr. Ly and his team are passionate about improving quality of life through simple, effective tools that support mental and physical well-being. What began as a small business has since grown into a global movement, serving health and wellness communities worldwide.

Our Story