Millions of users have android phone with them and they frequently go to the app store to download different kind of apps but do these are really of any use to them.
before downloading any app you should read about the functions of the app properly instead of downloading the app by simply viewing its screen shots because these screen shots are made to attract your attention in first place so you better go properly through the description of the app and then decide that whether you need that app or not.
you can also take help by reading reviews of others who had installed that app as it will help you to get an inside view of the real use of the app.