I am building my mobile apps (Android and iOS). I am not sure if I understand this correctly, but it seems Cloud Endpoints allow you to develop and deploy your own APIs, while App Engine assists you in building a server application? It seems App Engine also allows you to build a web application backend that exposes REST service APIs? So it can do whatever Cloud Endpoints can do? If I use Cloud Endpoints, can my APIs interact with some kind of DB? Is there anything I can do in App Engine but cannot do in Cloud Endpoints in the context of building a REST backend for mobile apps?
I understand this question is messy.. but Google does seems to have confusing documentations there. Thanks!
App Engine is just a compute platform on which Cloud Endpoints enabled apps can run. Cloud Endpoints provides frameworks which make writing a RESTful API easier (Java, Python), while also providing features to help you manage your APIs and access them from generated client libraries. You can use Cloud Endpoints in conjunction with a database of your choosing. The Cloud Endpoints frameworks previously linked essentially make it easy to map HTTP paths to methods, which do whatever you want.