We live in such an era of technological development. Smartphones were used in common, it makes life much more convenient but also harm to people in many ways. A survey shows that most people spend 3hr and 15 minutes on their phones per day on average, the top 20% of smartphone users spend more than 6.5 hours on their phones. I check up my screen time now, at 5:12 PM, it is 3h 53m. This number surprises me because I don’t remember I spend so much time on my phone so far today. But the record tells the truth, it is how my phone mess with my sense of time. I spend 99% of my screen time on social networking and entertainment. Being honestly, I usually check up the time by checking my phone when I am studying, half of these times, I just starting using my phone during my study time. When I was using these apps I though time flies, but when I spend time on studying I think time goes slow. Before I go sleep, it is my habit to check up the phone, it was the most attracting moment to me on my phone in the whole day. When I exit the phone because feeling tired, I found out it is 2 AM. It decreases my sleep quality because I don’t have enough time to sleep. Therefore, I think smartphone makes me messed up my time as my regular daily basis of device.