The Adform Android SDK by rprunskas allows to implement advertising features into mobile applications. Basic antegrations include inline ad, overlay ad, intersitial ad, adhesion ad, and video ad. Resources include advanced integrations and release notes.
Google announced multiple changes to its Ads and Search APIs. In the Ads API, changes were made to prevent the same payment account applying across manager account hierarchies. In the Search APIs, certain Android appearances that are no longer available in the Console UI are no longer supported.
A mobile app using the Google Analytics API ran into a really good problem to have. It got popular. The Analytiks app had enough users that it was frequently going beyond the 50K requests per day allotted to each developer. Each users has to authenticate, but then all share a single pool of requests. By contrast, the Twitter API's per-user limit makes more sense.