Why does Oura app HRV differ from the API HRV?

A different HRV in the provider's app versus the Terra API is usually a difference in calculation method, not a data discrepancy.

A different HRV in the provider's app versus the Terra API is usually a difference in calculation method, not a data discrepancy.

• Terra computes an arithmetic mean across all per-sample HRV readings for the sleep period (avg_hrv_rmssd).

• The provider app often displays its own internally pre-calculated average.

Both numbers reflect the same underlying samples, just aggregated differently. Provide the specific night's date to match values precisely.