Envelope, mail, mobile ui, message, email icon icon
Download the generated favicon
and extract the contents to the root directory of your site.
What's next?
Include the following code in the head of your HTML document.
<link rel="apple-touch-icon" sizes="16x16" href="/envelope_mail_mobile ui_message_email_icon_16.png">
<link rel="apple-touch-icon" sizes="32x32" href="/envelope_mail_mobile ui_message_email_icon_32.png">
<link rel="apple-touch-icon" sizes="64x64" href="/envelope_mail_mobile ui_message_email_icon_64.png">
<link rel="apple-touch-icon" sizes="128x128" href="/envelope_mail_mobile ui_message_email_icon_128.png">
<link rel="apple-touch-icon" sizes="256x256" href="/envelope_mail_mobile ui_message_email_icon_256.png">
<link rel="apple-touch-icon" sizes="512x512" href="/envelope_mail_mobile ui_message_email_icon_512.png">
<link rel="icon" type="image/png" sizes="16x16" href="/envelope_mail_mobile ui_message_email_icon.ico">
<link rel="manifest" href="/manifest.json">
<meta name="msapplication-TileColor" content="#ffffff">
<meta name="msapplication-TileImage" content="/envelope_mail_mobile ui_message_email_icon_128.png">
<meta name="theme-color" content="#ffffff">
What are Favicons?
Favicons are small 16x16 icon files that are displayed next to the URL of your site in a browser's address bar. Additionally they're often displayed next to the name of your site in a user's list of open tabs and bookmark listings making it easier for the user to quickly identify amongst other sites.
What are App Icons?
App Icons are the images you press on your smartphone to launch an application. As newer phones are released with higher resolution screens, higher resolution app icons are needed. Developers still want to maintain support for the older phones with lower resoltion so when you create an app icon you need to create several size variations of the same image. This is true for all smartphones like the iPhone and Android, and even tablets like iPad.
