Successful apps aren't just measured in terms of the downloads they're able to mop up.

As Rovio has proven, even the simplest of ideas can be transformed into a fully fledged businesses, growing to encapsulate brand that generate merchandise sales in the millions.

How you make the leap from an app that sells well to one that can fund the company entire, however, may not be clear for those new to the mobile business. This is where Google thinks it can lend a hand.

Lift-off

The firm has launched what it's billing as a bible for how to turn top apps into full on businesses.

Dubbed the 'Guide to the App Galaxy', it's designed to "help app developers, regardless of platform, build a business on mobile - whether they've just launched their first app or are looking for additional tips as they grow their portfolio".

There are four main areas - Promote, Earn, Measure and Evaluate - with sensible advice and tips from other developers provided; although neither are rocket science. 

Indeed, there's a certain amount of self-interest with two main tips focusing on developers employing AdMob and Google Analytics.

Still, it's worth checking out, if only for a 101 refresh. 

You can find the guide at GuidetoAppGalaxy.com.