UI Canvas Resolution for Phone and Tablet

The resolution of the UI canvas in a mobile game or app depends on the specific device it is being run on.

On smartphones, the most common resolutions are 720x1280 (HD), 1080x1920 (Full HD), and 1440x2560 (Quad HD). Tablet resolutions can vary widely, but common resolutions include 1024x768, 2048x1536, and 2560x1600.

It's important to design your UI with these variations in mind, as different devices will have different pixel densities and aspect ratios. To ensure that your UI looks good on all devices, you can use a technique called "responsive design," which involves creating flexible layouts that adjust to fit the available screen space.

One way to do this is to use a canvas scaler component in Unity, which allows you to specify a reference resolution and then scales the canvas accordingly. You can also use anchors and layout groups to position and size UI elements relative to the edges of the canvas or to each other.

Finally, it's a good idea to test your UI on a variety of devices to ensure that it looks and functions as intended.