List of Installed App From Google Play Against Google Account

Question

Following are my problems:-

1. Is it possible to get the list of applications that a user has installed, against their google account through Google Play, programmatically through the use of any api?. Please note that I am not asking about the list of apps currently installed in the device, but ones that have at some point been installed.

I need a solution to the above as I am thinking of a scenario in my app, which is:

• I want to give my app to the user for free during the first three months, after three months if user uninstalls the app and then installs it again I want to detect through any api (from Google Play) that the user has installed the app a second time (and should not get any free usage). Please note that I don't want to use any web service to store the account id & device id of the user at my side.

Answer 1

For option 2, you can create a file on the SD card. This will remain there when the user uninstalls/installs. But the user can always delete your special file. Unless you do something at your side, you are never sure if the user already used your app before.

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To be completely sure, store it online: You will need to have a very simple database which holds a list of device_id that installed your app. Further more a webpage which fills this database. In your app you download/open this webpage which the webpage will fill the DB.

App > WebClient (or other) which opens http://www.example.com/registerDevice.php?device_id=. The php site fills the db.

You app will need to check the database if the current device already has installed this app inorder to work/not work. You can do this via the same php and check the response. You could for example return 'ok' or 'not ok' or something else.