Momentum Unveils Open Wearables, an Open-Source API Integrating Data From 200+ Health Devices

The platform offers healthcare startups a self-hosted, HIPAA-ready alternative to expensive proprietary aggregators, significantly reducing integration time and cost.

Momentum has launched Open Wearables, an open-source infrastructure designed to unify data from more than 200 wearable devices, including Apple Health, Garmin, Suunto, and Polar, into a single developer API.

The platform offers healthcare startups a self-hosted, HIPAA-ready alternative to expensive proprietary aggregators, significantly reducing integration time and cost.

The release targets one of digital health’s long-standing challenges: interoperability. Despite the widespread adoption of consumer wearables, device data has remained siloed across closed ecosystems. Companies building digital health or AI tools have traditionally faced a choice between creating separate integrations for each device or paying high monthly fees to third-party SaaS aggregators.

Momentum positions Open Wearables as a direct response to this fragmentation. By consolidating diverse data streams into a unified API, the platform seeks to simplify infrastructure for developers working with metrics such as heart rate, HRV, step data, and sleep patterns. “We’re building the open infrastructure layer for health data that the industry has been missing,” said Jan Kamiński, CTO and Founder at Momentum. “Healthcare innovators shouldn’t have to choose between months of custom integration work or vendor lock-in with proprietary platforms.”

The platform’s open-source release on GitHub allows developers to download, deploy, and modify the codebase without licensing barriers. By eliminating per-integration development cycles that typically stretch for weeks, the model aims to free engineering teams to focus on analytics, product features, and clinical applications.

Privacy and compliance form a core part of the architecture. Unlike cloud-based aggregators that route data through external servers, Open Wearables is designed to be fully self-hosted. This approach allows digital health companies and researchers to maintain direct control over data flow, easing their compliance journey in HIPAA-regulated environments.

To support AI and machine-learning applications, the platform also introduces standardized schemas that normalize raw wearable data, which often varies in frequency and format across devices. This consistency is intended to reduce the preprocessing burden associated with training algorithms and building cross-platform analytics.

Momentum expects community contributions to play a central role in expanding device support and accelerating updates. “Our mission is to democratize wearables data access so that breakthrough health innovations aren’t limited to well-funded enterprises,” said Piotr Sędzik, CEO at Momentum.

Open Wearables is available immediately, with full source code accessible through Momentum’s GitHub repository and documentation available on the company’s website.

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