What CPI (Cost per install) should I give for promoting my Android app using AdWords?

#1 

Finding the right cost per install might be challenging and requires a lot of data processed: OS, type of traffic, country where you want to acquire users. All those factors can affect the price of one install.
At Clickky, we have developed a CPI recommendation tool, which aggregates data from Clickky’s CPI campaigns and makes estimations depending on your campaign data and the market demand. It works like this: you choose your campaign specifics and find out the price.
You can try out Clickky’s Self-Serve Platform for Advertisers — a completely automated solution for user acquisition. The Platform offers retention rate and blacklisting tool for effective campaign management, and complete transparency of the campaign run with the world’s top tracking solutions like Appmetrica, Kochava, Appsflyer.
Sign up for free and you can start your own campaigns in 10 minutes — the customization, management and testing are all under your control.






#2

If you need to get incentive installs and boots your app faster I can recommended your servise ny friend using everytime - company CPIMobi. Such company can help you to get installs from real people for popular price. For sure it will help your app to be promoted faster along with others methods.
But with your budget I think will be better to t4rey some free tools - share information about your app on forums ans social media and ask your friends to give feedback about your app.
Hope this helps