Apsalar’s advertising performance tracking tool, Campaign Source Insights now allows developers to determine exactly how much value Facebook’s new mobile app install ads are delivering.

Apsalar customers using Facebook’s mobile app install ads to promote their apps are now able to log into their dashboards and automatically see how many users specific advertising campaigns are delivering, and track how those users are behaving in terms of engagement and spend. This means developers using Facebook’s new mobile user acquisition channel can easily determine the ROI of their campaigns by comparing install cost to the lifetime value of the users acquired.

According to Apsalar CEO Michael Oiknine, his company had been working with Facebook for some time before Facebook’s mobile install ads launched earlier this week. The San Francisco-based mobile analytics provider is one of a select group of companies with products integrated into Facebook’s mobile ads, says Oiknine, and the the only one that can provide real-time analysis the lifetime revenue Facebook’s mobile ads generate for free.

“We’re a strong believer in the social aspect of discovery, and we welcome Facebook moving into this market. We think this will be a very good partnership,” said Oiknine.

iOS developers using Apsalar are able to use Campaign Source Insights to track their Facebook ads today, and the feature will be available to Android developers soon. Developers wishing to use the free tool don’t have to be Apsalar partners, but do need to sign up for Apsalar’s ApScience Analytics service.

Apsalar is backed  by $5.8 million in funding from Thomvest Ventures, Battery Ventures, DN Capital, 500 Startups, Morado Venture Partners and Seraph Group. The company’s network now reaches more than 300 million users on iOS and Android, up from the 225 million users the company reported in July.