If you use AdMob or other mobile ad networks to drive installs of iOS apps, here's some good news: iOS install tracking is coming as a Public Beta in a few weeks to all Google Analytics accounts. This detailed view of iOS install campaigns will be available right in your Google Analytics interface.

Install metrics are a useful way to measure your marketing campaign performance. However, not all marketing efforts create the same volume and quality of users. With these new reports, you'll see how one source performs compared to another, so you can optimize your marketing spend. You can even dive deeper into the same marketing channel to see how one campaign or ad is performing compared to another. 

For instance: If users coming from source X tend to use your app once and abandon it, while users from source Y tend to use it for eight months and generate $68 each in value, you'll know. And with Google Analytics' powerful segmentation, you can combine post-download metrics with your acquisition channels across all Google Analytics reports, to make even better decisions for your marketing programs.