I think the most useful invention is the smart phone. Why?

 

Because it’s magical, you only can use smart phone to do everything, and it’s not like the computer, which is heavy and not easy to bring.

You only can use this small item to do everything, like surf the Internet, contact your friends and family, and also can see each other’s face through FaceTime, not only this but like phone call, then you can hear other’s voice and talk such easily.

Nowadays, our smart phone is already like the Robert, so genius, I even thought iPhone is already smarter then me.

 

And you know?Why smart phone can be so convenient?

In Europe, lots of people them only bring their phone and wallet go out, and I know your phone can combine your credit card, as result, you only can pay buy your phone, in London and New York, such a big and developed city they really have done it.

 

Finally, I want to say technology is definitely the greatest invention in the world.

 

Like fin-tech is a trend in our society, actually you never know what’s the next trend and what we need in the future, but from the 20th to 21th century, smart phones are like our friends, they certainly help us a lot.