The world of app development has experienced significant growth since 2010, with millions of mobile and web apps available, making applications an essential part of our daily lives. However, this growth has also brought numerous security issues, including the use of amateur programmers, inefficient use of tools, web application attack vectors, lack of DevSecOps approach, open-source vulnerabilities, and inadequate user access management. To address these challenges, it is crucial to adopt a DevSecOps approach, implement a secure software development life cycle management process, address open-source vulnerabilities, automate simple security tasks, be aware of your own assets, conduct risk assessments, provide security training for developers, manage containers properly, limit user access to data, update and patch regularly, ensure access to log data, encrypt data, use pentesting, ensure accurate input validation, and aim for permanent fixes. By following these application security best practices, organizations can minimize the number of errors in their applications and make themselves a more challenging target to exploit.