How to promote my app to increase the number download?

Totally agree. Instagram stores are perfect for that, really makes people buy goods. I used to promote mine on Facebook but I think it's not so easy to use as IG. They both have a lot of spammers but unlike FB, Instagram has services like spamguardapp.com that fix the problem. And it's easy for customers to find products they need by using hashtags or geolocation. I consider trying Twitter as well, has anyone got any thought on it?

I am trying to do the same thing but forums are limited to newly registered users. I think we should write more on forums like this

You can put your app in a tester community page, so that many skilled testers give you a report and also download the app

nice idea

Promote it on social bookmarking sites, answer question sites, social media sites. I'm talking about pinterest, quora, mix, twitter and etc.

Publish app in Stores which help you to increase download for your app.

try "let me show you my app" forum in androidpit

ASO + Video + Social + Advertising (Facebook, Google)

Do a proper store listing check from which country you are getting downloads to try to localized screenshots for that country if it's not localized and make title and subtitle localized

The first thing would be to have an innovative app. In addition follow all the instructions of Google play and submit your app to as many review and test sites. Give your app away for free for one week every now and then and it will be listed on many sites that have apps gone free listings

Well I think to increasing number of App downloading the better way is to advertise your app share on social media platforms create a simple blog about app and also do email marketing for your app promotion.