Level: Intermediate
Simulated device previews are a useful starting point, but genuine testing on real hardware catches issues that simulation alone sometimes misses.
Simulators Are a Good First Pass, Not a Final Check
Browser-based device simulation is fast and convenient for early iteration, but doesn't perfectly replicate every real device's rendering behavior.
Test Across a Range of Actual Screen Sizes and Operating Systems
Real devices vary meaningfully even within the same general size category, making a range of genuine test devices more revealing than a single reference device.
Pay Attention to Real-World Conditions Too
Testing under a real mobile network connection, not just a fast office wifi connection, reveals performance issues a purely visual check wouldn't catch.
Next step: Use the Screen Resolution Simulator to preview your design across a wide range of screen resolutions as a first testing pass before moving to real device checks.