So after some time Ive decided to recreate my calculator app. The previous app was buggy and blurry and annoying enough that it deserved a remake.
Here is the original - http://aolucas.xyz/Calculator/
Here is the remake - http://codepen.io/itsMuse/full/MpyyKv/
To be fair, the original is made in nothing but javascript. Meaning it updates 60 frames per second when that tab is open. Witch is probably why it gets blurry as its having to redraw everything 60 times a second.