Twitter stickers are available to everyone in Twitter’s own iPhone app. Stickers let you add fun graphics to the photos you upload, just like you can do on other social network services. They’re easy to use, and TMO’s Jeff Gamet shows you how in this Quick Tip video.
Check It Out: How to use Twitter Stickers on the iPhone
Is this an iOS 10 feature? Don’t see it here in the UK on iOS 9.3.3