Go Speed supposed to speed up the phone but it does not do anything other than clearing cache and closing background applications and processes which is definitely not good for a smartphone. Clearing cache led applications to open slow by clearing their saved data and it have to load the whole data again and closing background applications and processes led to stop important phone procedures like stoping google applications.
This application named go speed is totally useless. If you feel like your phone is slow you can clear the memory manually. I would not recommend Go speed to anyone.