How to track app uninstall. Tools, products, libraries can help.

 I have created an android application two months ago . Here in this app user can share their life stories.https://play.google.com/store/apps/details?id=com.taletalkBut still i am not getting downloads & audience. Can someone please tell me how i can attract audience so that they will start downloading the app. Before replying to this question i would suggest you guys to download my application , so that you will get a clear understanding what my app is offering and what is missing in my application.Thanks

Even removed unused resource and applied progaurd couldnt able reduce the apk size more than 20%

Hi,I am creating an android application in which i have a card view in which my post is visible and below the post it has two textviews which is showing total no of comments and and likes. Now what i want to do is to update my total likes and comments whenever a new like or comment will be posted by some other users. In backend i am using php and mysql. I want to create a realtime app which will update the user interface whenever a new content is available same like firebase . As firebase displays the latest update as soon as the user has changed some value in the database and the same value gets reflected in the user interface.  

We are planning on building a mobile app at CutShort which will complement our main website. We're going ahead with React Native for the first MVP of the app.Now the question is, what all can be updated Over The Air (using services like Microsoft Codepush, etc)?E.g If right now we don't ask for contacts access, google calendar access, etc. and deploy the app, and the sometime in the future we want to ask for those permissions and build a feature around it. Will we be able to build the feature and push it OTA or will the user have to update the app from the Play Store?

As Google recently announced to support Kotlin officially and also Android Studio 3.0 will be supporting Kotlin, So do all application in future will be programmed in Kotlin?

Please help me how to integrate this service with android..

What would you prefer if you have been given this choice of going either Native way or cross platform way? Please provide different scenarios as well which may affect your decision.

I noticed that many Developers are still developing in Objective C even if it's new project.Any Special Reason behind it.? Thanks..

Android team of Google in I/O 2016 released the Constraint Layout. Would like to know if migrating/recoding to constraint layout will help make our app faster in terms of UI rendering ?

A Custom Bundled Notification or Default Bundled Notification ? Many devs have a difficult time deciding on the notifications.

Their are many resources out their regarding Banner and interstitial CPMs etc. But hardly anything for Native Ads. Please help with your experice (CPCs, CPIs and fill rates) or any resource for the same.