A long, but well written, article covering the concept and topic of fitness trackers, sleep monitors, etc:
In reality, user data is every tracking company’s most precious resource. They promise to provide the user a new way of thinking about their dog, their daily steps, their period, their focus, or their calorie consumption, but they’re also providing the company’s lifeblood — a means to make the product indispensable.
All of these strategies aim to keep users engaged, to further refine the hardware and software. The more active and consistent users, the more data, and the more they retain and attract active and consistent users, who generate even more data. And the more data, the more attractive the company becomes to potential investors and/or buyers. Comprehensive data sets catch the eye of Google and Apple, of course — both of which seem intent on building holistic data sets of consumers — but also big pharma and health insurance providers.