| Airship accepts push requests using UTF-8 character sets, including emoji. |
You can add emoji to your push notifications by accessing the Special Characters palette. On a Mac, this is under the Edit menu. On a Mac (10.9+) you can also use Control-Command-Space to access the special emoji keyboard.

Add Emoji to the notification in the Web Message Composer:
These character palettes can be used in the Message Composer to add emoji.

On the device:

Add Emoji to the notification via the Push API:
Example JSON Payload:
{
"audience": "all",
"device_types": ["ios", "android"],
"notification": {
"alert": "❤️ Urban Airship 👍🏻"
}
}