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Tracking users also means tracking something unique they can't easily change like IMEI/MEID/ESN. Anything else would not always be unique to a device. A lot of users tend to complain when you ask for the phone ID to retrieve that as well. That can also have issues on devices that do not have one of those (like some tablets) and if someone sells the device.
http://android-devel...tallations.html
The route I take is offering a limited scale app they can try and then give an in-app purchase to acquire more/rest of the content. Works better for games as you give all the features and only limit levels they play, but it can be applied to normal apps as well in a slightly different manner. Just have to make sure you give them what looks like enough content and word things correctly so they don't feel your app was doing a "bait and switch" and give you a bad rating.
http://android-devel...tallations.html
The route I take is offering a limited scale app they can try and then give an in-app purchase to acquire more/rest of the content. Works better for games as you give all the features and only limit levels they play, but it can be applied to normal apps as well in a slightly different manner. Just have to make sure you give them what looks like enough content and word things correctly so they don't feel your app was doing a "bait and switch" and give you a bad rating.
