Test on real devices refers to the process of performing software testing, including functional, compatibility, performance, and usability testing, on physical devices such as smartphones, tablets, smartwatches, and other hardware devices. This type of testing allows developers and testers to evaluate how an application behaves and performs in real-world conditions on actual devices that end-users will use.

Testing on real devices offers several advantages over testing on emulators or simulators, including:

Realistic Environment: Testing on real devices provides a more accurate representation of how the application will perform in real-world conditions, including variations in hardware configurations, operating systems, and network conditions.

Hardware-specific Testing: Real devices allow testers to verify how the application interacts with specific hardware features, such as cameras, sensors, GPS, accelerometers, and touchscreens, ensuring compatibility and functionality across different device models.

Performance Evaluation: Testing on real devices helps assess the performance of the application, including responsiveness, speed, and resource usage, under actual usage scenarios.

User Experience Validation: Real-device testing enables testers to evaluate the user experience, including usability, navigation, layout, and design, ensuring that the application meets user expectations and usability standards.

Network Conditions Testing: Real devices allow testers to evaluate the application's behavior under various network conditions, including different network speeds, connectivity issues, and offline scenarios.

Bug Detection: Testing on real devices helps uncover device-specific bugs, issues, and inconsistencies that may not be apparent in emulator or simulator testing.

Overall, testing on real devices is essential for ensuring the quality, reliability, and performance of mobile and IoT applications, providing valuable insights into how the application will perform in the hands of end-users.