Accessibility testing is a type of software testing, conducted within the process of typical differential and declarative testing measures, making certain that the application being tested is functional for people with unique needs, such as those with a hearing impairment or color blindness. It also takes into account the elderly and disadvantaged groups during the testing process.

This form of testing ultimately falls under the umbrella of usability testing, but for our purposes serves as its own subsection so that emphasis can be placed on the needs of the many, ensuring mobile apps are available to all who want to use them.