All screenshots should be generated on both iOS and Android so that users can see the slight differences on each platform. On an iPhone, you should use the Simulator configured for an iPhone 11. For Android, we recommend a Pixel 2 - though any device that runs at 1080x1920 resolution will work. When using the iOS simulator, it must be run on the Mac directly. Using it through Visual Studio on a PC will result in an incorrect image as it will attempt to pre-apply the border mask.