What kind of User data I can collect
<p>I was wondering if I ever need to collect any kind of user data (like their location, which I don't think I should collect now, their IMEI, their google account, app usage time etc), then how much of it I can collect without doing so illegally.</p>

<p>I know there will be issues with all of them, but since I couldn't find any document or question on SO, addressing this topic, telling me what kind of data I can collect, I am here with a question.</p>

<p>Hope to get nice answers.</p>

<p>Wish to mark it as a community wiki.</p>
