Application testing is to test applications and software built for the mobile phones to verify whether it meets the specified functional and non-functional requirements. Our testers intentionally try to make things go wrong to make an application error-free.
From the user interface, mobile application testing, performance testing, stress testing, monkey testing, etc., every aspect of testing is important to determine efficiency and stability.
A test plan contains details about the objectives, approach, scope. It focuses on a testing project, and a test case contains details about action and the expected response to verify if a particular feature is working correctly.