Smartphones vs smartwatches

Since smartwatches are worn on our wrists, they need not be carried separately like smartphones. They have sensors, using which health readings (heart ratings or calories expended) can be recoded quite accurately. Its users can send or answer messages, play songs or get directions while travelling, etc.   

Despite all these features, they are not as wholesome as smartphones. For instance, you cannot check your emails, click photographs or browse Google for information on smartwatches. You can use them only as accessories for specific purposes. They, in fact, only complement smartphones.