Working out which Android apps have ads from those that don't is about to get a whole lot easier. Developers can now voluntarily declare their apps contain ads, which will display a distinct "ad-supported" label on the apps Google Play Store listing. However by January 11, 2016, developers won't have a choice and the ad label will be mandatory.
Common ads including banner, loading page, native (including sponsored articles) and even ads for other apps by the developer are included in Google's non-exhaustive list of examples. The label will be similar to that found on "ad-supported family apps", seen above.
"Please note that misrepresenting ad presence violates Google Play Developer Program Policies and may lead to suspension.
"While developers are responsible for accurately declaring ad presence in their apps, Google may verify this at any time and display the “Ads” label if appropriate."
The new ad-supported label guidelines are available here.