The use of IoT devices and interconnectivity is having a profound impact on society, with up to 50 billion things expected to be connected by the end of this year. This shift in utilizing IoT brings new challenges in app development, including testing, which has multiple factors such as scalability, security, performance, and more. Various tools are available to help test IoT mobile apps, including MATLAB and Simulink for design and prototype development, IoTIFY for simulation as a service, BevyWise's IoT Simulator for cloud and on-premise MQTT application testing, the IBM Watson IoT Platform for data collection and analysis, LoadRunner for load testing and performance monitoring, NeoLoad for mobile load testing, Locust for open-source load testing using Python code, Apache JMeter for performance testing, and Instabug for mobile-focused stability and performance monitoring.