Estimate sweat loss and receive hydration guidance during and after workouts. Pair with a compatible device for real-time fluid loss estimates and post-workout summaries with detailed statistics. Personalize predictions by providing actual fluid loss measurements to improve accuracy over time.
1.6.1
October 18, 2026
Fixed startup crash on some iOS versions
The app uses a machine-learning model that analyzes metrics like heart rate, duration, temperature, and intensity collected from your compatible Garmin device. It then estimates your real-time fluid loss.
Yes, you can train a personalized model by providing actual fluid-loss measurements (weighing yourself before and after workouts). The more accurate data you input, the more precise the estimates become.
You need a Garmin Edge device that supports Connect IQ (such as Edge 840 or 850) and the FluidLoss data-field installed from the Connect IQ Store. The companion app itself requires iOS 11 or later.
No, Fluid Loss Companion App is ad-free. The app description explicitly states 'No ads'.
Yes, you can import past Garmin activities by sharing a Garmin Connect activity link to the app. You can then provide the fluid loss for that session without redoing the workout.
Post-workout recaps provide a clear overview with a chart of fluid loss over time, along with key statistics such as duration, distance, and training effect.
No, an account is not required to use Fluid Loss Companion App. This enhances user privacy and simplifies the setup process.
The latest version is 1.6, and the app was last updated on October 2, 2026. This indicates a recent update, suggesting ongoing development and support.
