Flesky is a custom keyboard for the iOS users. This keyboard is available for Android users too (play store link). The keyboard is a paid one but for iOS users can get Fleksy + GiF Keyboard for free for a limited time from iTunes store.
Features
Customization – You can set theme of your keyboard and there are so many themes available. More than 30 color themes and 3 customizable sizes are available.
Gestures – Keyboard support gesture typing which will help you to type faster
Language support – It will support more than 40 languages
Now Flesky integrated Riffsy GIF Keyboard with their product
bigger, better quality GIFs
all the best reaction GIFs
explore popular categories and trending GIFs
double tap GIFs to add them to your Favorites
save GIFs to your camera roll
access recently used GIFs
tap+hold a GIF for more options (such as view in full screen)
Compatibility: Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
You can get this keyboard from the iTunes Store, offer may expire at any time, so grab it fast.
Thank you Ashwin