Why Your Fitness Devices Won’t Talk to Each Other

A major obstacle in the wearable technology space is cross-platform data sharing. While consumers now have access to a diverse array of gadgets—spanning activity monitors, heart rate sensors, and wearable diagnostics—these devices often operate in isolated ecosystems. A user might own a Oura ring for sleep analysis, but none of these devices can seamlessly share data with each other. This fragmentation creates a frustrating experience for those who seek a comprehensive dashboard of wellness data. Brands build their ecosystems to trap customers within proprietary networks. This strategy drives long-term monetization, but it comes at the cost of user convenience. Data collected on one device rarely transfers cleanly to another, even when both devices measure the same metric. For example, Garmin’s sleep scoring differs fundamentally from Apple’s sleep stages, making direct comparisons misleading. Even when data can be exported, it involves clunky workarounds that are confusing for non-tech users. Medical professionals encounter significant obstacles. When patients use multiple wearables, doctors receive fragmented or inconsistent data that make diagnosis and monitoring difficult. A patient might show abnormal sleep patterns in one app but normal in another, leading to diagnostic uncertainty. Without standardized formats and protocols, interoperability is still theoretical. Industry-wide protocols could resolve this, but implementation is minimal. Organizations like health data alliances have proposed standardized data schemas, but only a handful comply. Instead, vendor-specific interfaces prevail, making it a barrier to third-party innovation. Even when APIs are available, they are often incomplete, inconsistently maintained, or unpredictably altered. Without standardization, innovation stalls. Developers struggle to create apps that aggregate data across platforms to deliver personalized health recommendations. Researchers cannot compile reliable epidemiological data. And users are forced to choose one device over another not because it’s the best, but because it works with their smartphone or smart home. Until there is a collective push from manufacturers, governments, and end-users for open, standardized data exchange, the vision of real-time wellness monitoring—to provide holistic, real-time health insights—will remain unfulfilled. True progress will require companies to prioritize user benefit over ecosystem control and to foster openness instead of exclusivity.