How to install:
1. Install APK (make sure you have "unknown source" checked in security settings)
2. Open LG G3 Keyboard and Click Install button and wait for install
3. Reboot Device
4. In "Language & Input" select LG Keyboard as default
5. Set up lg keyboard (height theme color and what not)
6.ENJOY
Lo he probado y predice muy muy bien , dejo el enlace a XDA
http://forum.xda-developers.com/show....php?t=2793602
Compatible con 4.4.4 stock que es que yo he usado.