Protractor + Appium - How to navigate between two apps

I need to automate the scenario where I navigate from App (A) to App (B) on clicking the button in App (A).

I have a capabilities with App A in Protractor.conf.js, on launch of App A, I perform search and from search result, I click on any item in the list, which takes me to another app (App B).

Issue: On launch of App B, click action needs to be performed, where click still performs on App A rather on App B

any steps or the code snippets / Suggestion will help me a lot.