For indoor workouts, there's accelerometer and gyroscope sensors to track movement and you have an optical heart rate sensor to track effort levels during workouts too.
You can customize 7 out of the 17 essential widgets and tailor them to suit your needs.
It does those core tracker staples well though on the whole.
It is lightweight and lasts for up to 16 days on a full charge.
The 4 modes that are supported are GPS, GLONASS, Galileo, and BDS.
The overall fitness data works as a great guide.