For the smartphone user who love to chat on their smartphone throughout the day will definitely love this application named Apaptxt which is available for free on Play Store (but with many restrictions, you can get rid of those restrictions once you pay and become the premium members of that application). Well there are many reasons due to which it will make typing fun and thus you will not be able to stop yourself from typing more and long.
If you are using that application for free, you will have 3 themes in which you can switch your keyboard, now these themes will not only change your keypad in terms of looks but also in terms of feel. I am using Xperia and I usually feel that hepatic feedback on my phone is little bit more than usual but this application helped to reduce that effect to a certain extent on its own.
Apart from this the sounds for key tapping will be changes to some other sound and in all the keypad will look new, another good thing is that when you will want to use the special characters or the punctuation marks then you usually have to press a key at the left hand side bottom corner to change the layout and then you get to choose those characters. In this keyboard pattern you will see those punctuation characters at the top of the main alphabets written on the keyboard and to choose them you will have to tap and hold those alphabet keys.
For the premium users, you can change the width of the suggestion bar where you see the suggestion for the pressed keys on the keyboard and you can also change the lay of the keys on the keyboard like changing the position of the keys on the keyboard. You can also change the style of the keys on the keyboard and the size of the keys on the keyboard.
Being a paid user you can also enable the option to customize the colors of the keyboard in the way you want to and apart from these a free user can also choose to have the keyboard of any language he prefers to use like Chinese, Japanese, English UK and others. You can download more themes but all the other extra themes can be download after buying them at 0.99$ USD.