[Help!] Screen calibration app for the N4

I'll be receiving my N4 in about a month's time. One of the standard gripes I've heard (esp. from people coming from the GNex, which I have now), is that the screen looks washed out. Are there any decent screen calibration apps that I can use if I end up not liking the standard calibration on the N4 myself?

Thanks for your time and help!