What is the best way to stay fit?

Tracking your fitness is the best way to stay fit in. But how would you track it? This is where Soulfit’s “Sonic V08” comes in the game.
Allow me to enlighten you with this “Sonic V08” thing.. So it’s a

1. bluetooth earpiece
2. smartwatch
3. fitness band

basically all in one.
Sonic V08 is a Fitness band which also happens to be a smart watch and with a detachable display it also becomes a bluetooth...

What is the best way to stay fit?