Fitness tech startup Form launches its first product today: augmented reality swimming goggles.

You might think AR sounds like a bit of a gimmick for swimmers. I certainly did. My Apple Watch already does a pretty good job of logging my swimming workouts, so I didn’t see the need for yet another gadget.

But after testing a pair of Form Swim Goggles for the past month, I’m so impressed that I’ll never use my Apple Watch in the pool again.

Augmented reality swim goggles made by Form soon will add support for select Polar heart rate monitors.

With Apple Watch, you must stop swimming and raise your wrist in order to check your heart rate. But thanks to Form Swim Goggles’ built-in AR display, wearers of a Polar monitor will be able to view their heart rate in real time while swimming.