As you all know that ,SharePoint 2013 comes up with SharePoint Store. There are two services which are required to run if we want to configure our apps on the SharePoint environment.
Steps :
1. Verify that you are a member of the farm administrators group in Central Administration.
2. In SharePoint 2013 Central Administration, click System Settings.
3. On the System Settings page, under Servers, click Manage services on server.
4. Find App Management Service, click Start.
5. Find Microsoft SharePoint Foundation Subscription Settings Service, click Start.
happy Share Pointing :-)