The app lets you hide your Profile picture / Last seen / Status from some set of people.
One important thing you need to do is to keep your Whats app's privacy setting to 'My contacts'.
The app will add the respective contact from Whats app to your WhatsHide's contact list.
If you want to hide your Profile picture / Last seen / Status from that contact, The app will help you in easy deletion of contact from your Phone's contact memory. Because the contact is no more available in the Phone's contact memory and your Whats app's privacy is only limited to your contacts. The person cannot see your Profile picture / Last seen / Status.
You can make a call to that person using this app if the contact is hidden. If you want to add that contact back in your Phone's memory you can do it by a single button click with the help of this app.