Fourth Frontier X3: All you need to know
Fourth Frontier launched the Frontier X3 in the US at $649. This guide covers what it does for training and health, what it cannot tell you, and the risks to weigh before buying.
The news desk
Fourth Frontier X3 launches in the US at $649
Fourth Frontier launches the Frontier X3 in the US at $649. On October 7, 2026, The 5K Runner sports tech published a buying guide covering the device's training and health features, what it cannot provide, and the risks to weigh before buying. Public reporting so far covers only the launch information and this buying guide, with no further product details or subsequent developments disclosed.