FastFlow is the only fasting tracker that connects to your Garmin and Apple Watch in real time over BLE. Instead of a countdown, it coaches you through six metabolic stages — Fed, Clearing, Shifting, Burning, Cleansing, Renewing — while showing live heart rate, HRV, Body Battery and stress. iOS Live Activity + Dynamic Island keep your fast a glance away. Built for people 40+ who want to work with the body, not against it.
