sweatstack

SweatStack is a sports data platform designed for developers seeking to integrate data from various wearable devices into their applications. It addresses the challenge of building and maintaining infrastructure for authentication, schema normalization, athlete profiling, and training-zone calculations, which are typically time-consuming and do not offer a competitive edge to sports app teams. The platform provides a unified API that delivers data in a consistent format regardless of the wearable source, streamlining the development process for sports and fitness applications.

Developers can access SweatStack through multiple delivery options, including a Python SDK, command-line interface (CLI), in-browser REPL, and hosted pages. The platform also offers integration with frameworks such as FastAPI, allowing for rapid onboarding and seamless user authentication with their existing wearable accounts. SweatStack supports querying months or years of longitudinal sports data in seconds, with no need for developers to maintain their own data pipelines or manage rate limits imposed by wearable providers. The response to data queries can be obtained in Parquet file format. icu, with plans to add Polar Flow, Wahoo, Suunto, and Apple Health in the future. Custom integrations are also available upon request.

SweatStack emphasizes user data ownership, requiring explicit user permission for data access and allowing users to revoke access at any time. The platform commits to developer-friendly policies, such as versioned terms, a 12-month deprecation notice for API changes, and no exit fees. For teams and organizations, SweatStack offers a team account with unlimited internal tools, enabling coaches and analysts to access athlete data from a unified dashboard once consent is provided.

The service is available with transparent pricing: it is free for individual tinkerers and charges $30 per month plus a per-monthly-active-user fee for commercial use. SweatStack is open source and distributed under the MIT license, granting users broad rights to use, modify, and distribute the software.