Other companies including Garmin and Zepp, the latter of which just agreed to stop selling one of its sensors in the US as part of a patent dispute settlement with Blast Motion, also offer golf swing sensors. But, like Blast Motion's Blast Golf setup, they're external sensors that attach to a golfer's glove or club. The Spider Interactive putter, however, houses the sensor within the grip.

The putter will be available in various versions starting March 23rd and will cost $400. The mobile app will be available on iOS March 1st and on Android later in 2018.