Best body measurement tracker for data analysts

The body measurement tracking space has roughly 150-200 apps globally, but almost none are designed with data analysts as the primary user. The common failure is that existing tools (Apple Health, MyFitnessPal, Withings) prioritize UI polish and social features over data export, API access, and statistical rigor. Most analysts resort to using spreadsheets or stitching together multiple platforms because the tools available treat data as a means to an end (motivation) rather than the end itself. The actual gap is clear: there's no tracking tool built for someone who wants CSV exports, correlation analysis, trend modeling, and integration with their data pipeline. A founder shipping here should focus on three things—first, dead-simple data export (JSON, CSV, Parquet); second, zero vendor lock-in and full data ownership; third, built-in statistical dashboards that show confidence intervals, seasonal decomposition, and anomaly detection, not just line charts. The audience is small but highly specific: data professionals, quantified-self enthusiasts, and researchers who are already paying for specialized tools in other categories.