GO speed is an app to improve the speed of the smarphone. It claims to speed the phone.
But technically it cant do it. The speed of the phone only depends on the RAM and Processor of the phone. These apps cant increase the speed of working of any smarphone.
These type of apps decrease the speed of phones with low ram.
I installed the app to try it out. But the app did not make any difference in the working of the phone. Sometimes the phone started lagging because of the notifications of this app.
So frankly speaking, this app is not useful.