Bioimpedance analysis is fully safe. To get data about your body we provide a small signal through upper body to calculate active and reactive resistance. Knowing your age, weight, and gender we could calculate body fat/mass/hydration percentage.
We are calculating your lower body fat/mass/hydration volume using your height, weight, age and upper body BIA results. Also, we will increase accuracy, based on your physical activity and heart rate. Moreover, you could choose what body type you have. Now, our accuracy rate is pretty high: ~91%
Yes, we use combined HR sensor, including Red and IR light sources to measure your heart rate. We use smart algorithm: at rest, it measures every 5 minutes, if activity raises frequency will be increased up to 5 times per second. Also, you can measure heart rate on demand and adjust frequency for your needs. HRV measuring will be added in the next software updates of the AURA Band.
Yes, AURA Band supports data exchange with Apple HealthKit, Google Fit, and own API. Moreover, if the Stretch Goal 1 will be reached we plan to add integrations with Strava, MyFitness Pal and Runtastic on release.