With the rapid smartphone growth, it’s no surprise that consumers are downloading a huge number of apps--10 billion on Android alone, as of last week. Many app developers are recognizing the opportunity to develop on Android, including PrivacyStar , a small privacy services company offering smartphone users the ability to block unwanted calls from telemarketers via their mobile app. To help grow their business on Android, PrivacyStar looked to AdMob to drive quality downloads of their app.Google Analytics . App placements were limited to particular app categories to focus their audience and placements that didn’t meet the aggressive CPM targets were excluded. Within a month of these optimizations, cost per acquisition fell to less than $2, a fraction of their initial acquisition cost. Additionally, the quality of downloads that AdMob drove were far superior, with more users upgrading to a monthly subscription.full case study .
