If you want to get more downloads for you apps you should upload your apps on those site who help to promote your apps. It will help you to increase your apps downloader and you can earn money with this process.
According to me you should find a great platform where you can place your apps for more visibility. There are lots of online platform from where you can increase visibility your apps. I know a well reputed platform you can get help from them Apptuck.com.
Hi dude, you can also reach out to other app review sites to help you get the word out about your app. I am an editor for TheRecapp dot com, if you send us your app and we like it, we'll write a review about it and post it on our site, all free, no need to pay! Check out our site when you are ready to launch your app!
Contact some popular press release sites like prmac that makes some noise about your release and that brings you more exposure about your Apps. Also, provide a free trial for them and ask them to do review of your app on their site. This will bring your app into limelight.
You could also create a Visual QR Code for you app and start sharing the photo on social networks (facebook , twitter , google plus),
There are some tools to create regular QR but I really liked Free Visual QR Code Generator | Custom QR Code Design | Visualead where you can put the QR on your logo and it's a dynamic one (meaning you can use same QR for android/iphone/windows).
I even printed some of my QR and handed it at my college( got around 2000 downloads)
There is no easy way. For the iPhone there over 500 apps a day being released. You need a unique experience for the game and a way of showing people why it's different. The big companies get the easy promotions and us little guys have to work hard and hope for some luck.