We’ve all loved how the Gmail app for Android has evolved since it first came out. We all love the fact that the app is as clean and simple as it gets, and that it does not have ads or any other unwanted additions. However, going by the recent findings by folks at Android Police, this is all set to change!
Google just rolled out v4.6 of the Gmail app for Android, which was subjected to a teardown by Artem Russakovskii of Android Police. A reference to a completely new library, i.e., ‘ads’ was found, hinting to possible ads in future versions of the app.
Although ads aren’t yet live on the Gmail app, you can expect Google to start rolling them out within a few days. We believe it was just about time that Google went on to monetize the Gmail app, which is used by millions from around the world!Source]