AppChecker is a static analysis tool. Currently, information technology has penetrated into almost all areas of business. To solve business problems, large, distributed, constantly modified information systems with a tendency to complication are created. They can include both ready-made solutions and external IT services (SaaS), own and custom development, free open source products (open source). Problems in their work lead to violation of information security, and as a result, to financial and reputational losses of business. According to the study, the last four years, financial losses of business are growing due to cyber attacks. Increasing the complexity of the software systems used, their inclusion in the circuit of state control systems and industrial production require continuous improvement of testing methods, testing and control of software.