text: arre,kal maine suna ki naye smartwatches mein heart rate monitor ke alawa sleep tracking bhi hota hai, kya yeh sach hai ya sirf marketing gimmick hai?haan yaar, mujhe bhi laga tha ki yeh sirf hype hai, lekin maine apne dost se suna ki uski watch ne uski sleep quality ko kaafi improve kiya hai!