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.

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Already own an apple watch?

Flex requires an
Apple Watch

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.

Device Support

Does Flex Support my Apple Watch?

Yes, Flex supports all Apple Watch versions. So sign up, what are you waiting for!

Does Flex Support my Fitbit?

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.

What are all the devices Flex supports?

  • 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)

Earlybird Offer

$9.99 per month

$4.99 with our annual plan

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