It has become a fashion to monitor our physical functions with innovative electronic gadgets. Wearable devices are wrapping up our body. They have proliferated in recent years, triggered by the social media. One estimate puts the total number of wearables at 200 million and it is expected to reach 88 million in the next three years.

   Wearbles are changing the lifestyle of people although slowly. The Apple watch best illustrates the changing attitude to wearables. Initially there was some doubt if a watch should indeed be expected to carry out some of the functions now available in the new gadget. It is reported that as many as 10,000 apps can be used, though it would be difficult to find one using even half of it! The market has accepted the watch and experts have picked up some popular apps. Some of the more popular ones indicate the user preferences whatever the pundits may predict.

   For instance, there is a cheat sheet,....