Yes its true now you can reduce lags
on your android phones up to 90% and its
100% working,There is an App called
SEEDER in the market with this App you can
Reduce lags on your android smartphone
upto 90%,Lags Reduces and improving
performance of scrolling,gaming and using
any Heavy Apps.This Application is
developed by XDA member lambgx02.
Looks like this App is gonna be
very useful for Armv6 phones users because
there are so many lags on apps and
games.so if you have a rooted phone then
this app is a must have for you.
Developer Comment:
Many applications load significantly faster
(particularly large ones like Facebook,
Chrome, and YouTube), and task switching
becomes effortless. Never again will you
wait in frustration, as the home screen
slowly redraws its icons and widgets after
pressing the home button on a busy device.

Download here
http://..com/2014/10/how-to-reduce-lags-on-android.html?m=1

Is it for rooted phones only?

Yes for rooted phones only and it's for sale on Google play unless u follow the OP's link

I just download am I go let you know how far on am thanks