It’s easiest to create page sizes that are optimised for iPad and use this across all devices including Android 1535 x 2048 pixels.
To optimise page sizes for different device types, we recommend to create PDFs with page sizes targeted to the different largest latest device versions.
iPad: 1535 x 2048 pixels
iPhone: 1242 x 2208 pixels
Android tablet: 1600 x 2560 pixels
Android phone: 1080 x 1920 pixels