how much is its power?

The "how much is its power?" android application provides an approximation to some electrical appliances power requirements. There may be a lot of reasons for different people to have the intention to know some electrical devices power consumption. For example an electrical installation designer always starts his work by calculating an initial power demand approximation. Sometimes, we just want to be sure that recently bought appliance is in a reasonable power consumption range or to compare its quality to other similar products.
Aside from why the information provided to you through this application, we have tried to take introductory aspects of some technical electrical terms into account in some explanations. Surely, your comments will help us achieve this aim.