Limber Technologies

Limber Technologies is a health technology company developing a digital-first mobility therapy for older adults and people with impaired movement. Its current product turns a smartwatch, worn clipped at the waist near the body's center of mass, into a motion sensor that tracks micro-changes in balance, gait and rhythm. From that signal the app continuously estimates measures clinicians use in the clinic — Timed Up & Go, the Short Physical Performance Battery, the Six-Minute Walk Test, four-metre gait speed, postural steadiness, cadence, stride and turns, walking bouts and steps, and a frailty early-warning index — without requiring a clinic visit or additional hardware.

Around that measurement layer the company delivers a daily ten-minute coaching session, part of an eight-week structured program based on clinically validated protocols, that targets the cognitive and affective aspects of movement alongside physical exercise. An conversational guide, which has access to the user's session, walking and journal data, answers questions in natural language by voice or text and adjusts daily exercise selection to recent signals. The app surfaces a composite mobility score, weekly trends, hour-by-hour movement detail and logged events.

Earlier company descriptions characterize Limber as a tech-enabled fall-prevention service delivered through smart assistive mobility devices such as canes, crutches and walkers, whose embedded sensors monitored movement and gait to support remote monitoring, coaching and data-driven physical therapy for the roughly 40 million Americans with walking difficulties.

Founding story

Co-founders Rachael Wallach and Stephanie Tietz met at Stanford University and moved early into wearable technology, motivated by its potential to help people adapt to change as they age. Wallach, who holds an MBA from Stanford and a BA from Cambridge, previously designed and operated services for the UK's National Health Service and developed UK government policy, and served as Vice Chair of the disability charity Scope and on the boards of the Social Care Institute for Excellence and Community Integrated Care.

Business model

Limber offers a consumer-facing digital therapy subscription built around software that turns an existing smartwatch into a motion sensor, combining continuous mobility monitoring with a structured coaching program; earlier descriptions position the offering as a connected-device service providing 24/7 monitoring, on-demand coaching and virtual care for seniors with impaired mobility.

Traction

Backed by Serena Williams / Serena Ventures, Techstars, MassRobotics, StartX, Ulu Ventures and a Lightspeed scout fund; a company listing reports six employees as of February 2024 and a headcount range of 1-10.

Latest developments

The consumer smartwatch-based app is described on the company site as coming soon, with a waitlist for early access. Founder and CEO Rachael Wallach is listed as a speaker at the Robotics Summit & Expo.