<p>Google has apparently begun inserting adverts into Gmail for Android, with the mobile app beginning to show promotional content similar to its desktop version, albeit limited to one sub-inbox. The adverts were spotted by Dutch site Android World, slotted in at the top of the "Promotions" inbox Google introduced as part of its categories system back in June.</p><p>Signs that advertising was headed to the Gmail Android app were spotted late last month, when chunks of code referring to how promotions would be handled in the software were caught. At the time, though, it was unclear where Google would place its adverts and how frequently they might show up.</p><p>Now, it seems like for the moment at least they'll be limited to the Promotions inbox, rather than spreading throughout the Gmail app.</p><p>Google has always been upfront about the fact that it mines messages for potential advertising connections and supports its free Gmail service by effectively sponsoring it. The only way to avoid seeing adverts is to pay for Google Apps service; those inboxes, which are in fact yet to see the various categories introduced, should remain free of promotions.</p><p><a href="http://www.slashgear.com/gmail-adverts-reportedly-appear-in-android-app-04300332/">Keep reading...</a></p><p>Read also:</p><p><a href="http://androidcommunity.com/gmail-ads-are-starting-to-show-up-on-users-devices-20131004/">GMail ads are starting to show up on users' devices</a> (Android Community)</p><p><a href="http://liliputing.com/2013/10/google-now-delivering-ads-gmail-app-android.html">Google now delivering ads in the Gmail app for Android</a> (Liliputing)</p><p><a href="http://www.phonedog.com/2013/10/04/gmail-for-android-app-now-displaying-ads-to-some-users/">Gmail for Android app now displaying ads to some users</a> (PhoneDog)</p><p>Explore: <a href="http://news.google.com/news/more?ncl=d1RJw-8TlNWJU7MAm-n07gL18vK_M&ned=us">8 additional articles.</a></p>