Take the latest VB Survey to share how your company is implementing AI today.

App Annie is a gosh-awful name for a really great service (the company provides app store data to developers and others), and it’s just announced a $6 million round of funding.

This is the startup’s second round of institutional funding. It took its first VC round waaaaay back in 2011 from IDG Ventures; the terms of that deal were not disclosed.

Participants in the current round include IDG as well as e.ventures, Infinity Venture Partners, Kii Capital, angel investor Jarl Mohn, and Greycroft Partners, which led the Series B.

The company tells us this morning that 80 of the top 100 highest-grossing iOS publishers use its services to gather and make sense of data on “downloads, revenues, in-app purchase, and ranking data across categories and geographies as well as trend analysis across the iOS, Mac, and Google Play app stores.”

In fact, App Annie just announced its analytics for Android apps in Google Play this past June, including freemium options as well as an enterprise-grade service for total Android intelligence-gathering.

The funding will be used in part to expand into new app stores. we’re guessing this means Windows Phone analytics and possibly some third-party or platform-agnostic app marketplaces, such as Facebook’s own app center.

The 30-person startup will also be hiring and expanding in its San Francisco and Beijing offices.

“App stores are driving today’s digital economy,” said Greycroft partner Dana Settle today in a statement on the funding. “App Annie is an invaluable tool for any business that needs access to the highest quality app store analytics and market data. As the marketplace for mobile apps and digital goods continues to explode, App Annie is incredibly well positioned to become the de facto analytics and intelligence standard across all platforms.”