Innovations such as 5G and AI are influencing the field of mobile app testing, though they are not yet widely adopted. In this context, software performance engineering is becoming increasingly important, distinguishing itself from performance testing. While performance testing focuses on identifying issues through test scripts and specific metrics, performance engineering is a holistic approach integrated into every phase of the software development lifecycle, emphasizing proactive performance optimization. This shift from testing to engineering assists companies in building systems aligned with performance standards, enhancing scalability, and achieving competitive advantages. Tools like NeoLoad, WebLOAD, Jmeter, Gatling, and LoadRunner are essential for performance testing, while solutions like Luciq provide real-time insights and comprehensive feedback throughout the app lifecycle, facilitating confident releases and iterations.