Remote Desktop Connection

I use an iPhone, iPad and now the iMac. It's running El Capitan and is a thing of beauty!
I used a Windows 10 laptop before and connected to my work server using Remote Desktop Connection.
I have trawled through a few websites which give apps to connect which, on the reviews, do not look particularly good. Is there a standard way of connecting to a remote desktop in a mac or perhaps you could recommend an app to use?
Many thanks for your help
Philip