Increase free app downloads

Hi Guys,

I've always seen apps in app store and google play right off the launch of their app go straight to the top of the free charts, so there got to be some tricks to get downloads to your app so it increases in ranking I thought there won't be any other place to ask this then here. Do you guys know any services or any tricks to get downloads to your free app?

Many App owners doing cross promotion of other apps. So that, they are getting more downloads and top the list.

There are so many free Exchange Reviews sites, Here are some of the best ...

risemyapp.com
moreappreviews.com/
install4install.com/
smoothreviews.com
reviewsmotion.com/

I hope you will love it.,
Thanks