GitHub Services Deprecation


Hello everyone,
I’m currently having some problems understanding the whole “GitHub services will be deprecated in October, 2018”.
I was thinking of building an iOS application “for GitHub” and I was thinking about using the REST API v3. So my question this, with GitHub Services being deprecated does this mean that REST API v3 will be deprecated and GraphQL API should be the one used? Or GitHub Services is a whole different thing and I’m safe using REST API v3?

Best regards,
Pedro Carrasco