Flex is powered by your Apple Watch
CooSpo Heart Rate Monitor
Flex has partnered with CooSpo to deliver a real-time heart rate monitor perfect for bodyweight workouts. The CooSpo H8 comes fully equipment with Bluetooth 4.0 support at a 10 meter range. Expect 2-4 day delivery.
Flex requires an
Flex works with any Apple Watch. If you have an Apple Watch, you're all set.
We're actively working on supporting all smart watches in the near future.
We're working on adding support for the new Fitbit Versa and Ionic smart watches.
Unfortunately, Fitbit's bands cannot be used to collected real-time heart rate and rep data. Fitbit's are designed to be worn throughout the day and, as such, only transmit data periodically to preserve battery life. Also, they don't have a motion sensor, making it impossible to count your reps.
Apple Watch Series 0,1,2,3 & Sport
Smart watches running Android Wear OS (coming soon)
Samsung Gear (coming soon)
Fitbit Versa & Ionic (coming soon)