Modern web standards require at least two key icon sizes to make an app "installable": and 512x512px . The 192px version is the sweet spot for:
: For "maskable" icons (those that change shape based on the device's theme, like circles or squares), keep your main logo within a "safe zone"—roughly the center 80% of the image—to avoid it being clipped. Where to Find or Create One icon-192x192.png
You do not need a physical Android phone for basic testing. Use Chrome DevTools: Modern web standards require at least two key