Polar isn't as big a name in fitness watches as competitors like Garmin, but it believes it has a way to extend its footprint: license its technology to those rivals. The company is now making 25 fitness algorithms available to some companies. "Powered by Polar" watches can use the brand's activity, health and sleep tracking know-how in combination with their own hardware and services. Third parties won't have to pour years of research into their products just to get started, Polar claims.

The first watch to use Polar's framework is Casio's new G-Shock G-Squad GBD-H2000. There aren't many official details at tis stage, but the sequel to the GBD-H1000 is expected to feature a similarly chunky design while adding Polar's fitness science and a gyroscope. It should still include solar-assisted charging, GPS and a host of sensors that include an altimeter, barometer, compass and thermometer.