It uses proprietary electrode sensor technology to continuously measure electrical changes in your sweat, directly related to the sweat sodium concentration and estimates fluid losses. The data syncs to the companion app via Bluetooth for instant feedback.

No, it is a standalone device. It can be clipped onto any standard heart rate monitor strap, whether chest or arm based, or onto the provided straps included with the device in medium and large sizes. The body location is selected in the hDrop App to ensure accurate sweat measurement based on where the device is worn.

A single charge provides 120 hours of active tracking time. The device is rechargeable via USB, so you can use it for days of training on one charge cycle.

The hDrop Gen 2 is rated IP66, meaning it is resistant to sweat and light rain. It is not designed for use in heavy rain, swimming, or sauna environments.

The device has been independently and scientifically validated, with preliminary results showing an average accuracy of 92% for fluid loss and 87% for sodium loss over 60 minutes of exercise. These measurements provide consistent, actionable data to support the development of a personalized hydration strategy over time.

The hDrop Gen 2 connects via Bluetooth to the companion smartphone app on iOS and Android. It also integrates with Garmin through a data field that writes directly into your FIT files. In addition, other wearables can be linked to the hDrop App via Health Connect or Apple HealthKit to display heart rate data within the app.