There are a lot of methods to catch your potential client, but you can waste a lot of money in case your app is useless, not actual and has some errors in its running.
Any promotion in Store begins from driving installs for your app as due to them you will get tons of traffic which let you gain the top positions.
After you become visible and accessible for wide auditory which will be interested in trying your app. In case you are really interested in boosting app installs for both: ios and Android - go straight to [b]KeenMobi [/b]and order the large volumes of installs.
There are different options for ordering the installs: geo targeting or worldwide traffic, different speed: normal and high speed installs, keyword installs which improve your search ranking position.
Also, a mast is [b]ASO service [/b]which allow to be visible for target users who looking for relevant app via keywords. The seasoned professionals from Keenmobi will provide you decent ASO service providing the weigh traffic keywords and make your app really visible and generate a lot of organic traffic.
After your app will be promoted well - you can get certain benefits from it: to place the ads in it or to develop the paid version.
Good luck and be promoted!