When a technology giant absorbs a beloved tool into a broader platform, the people who built their daily rituals around that tool are left to find new ground. Google's folding of Fitbit into its AI-centered Google Health platform has prompted a quiet migration among longtime users — not toward a single replacement, but toward a landscape of apps each built on a distinct philosophy of what it means to care for one's body. The abundance of alternatives reveals something worth noting: fitness tracking is not one thing, but many, and the right tool depends entirely on what a person believes their