Software testing is a standard component of software development. Sets of tests and evaluations must be developed for use at various phases of development. Indeed, testing should take place at all phases of development, including after your major launch. Things change, platforms are upgraded, and flaws in mobile apps that were not obvious prior to an operating system update can cause chaos.  Typically, this entails examining the programme as well as its component parts, and then prioritising any sections that you believe are more vulnerable than others. The functionality is then tested, and any faults found are documented.