5% of free iPhone apps ony last 1 month?

According to Pinch Media, based on the first 30,000,000 iPhone application downloads from Apple’s App Store, a free app has less than 5% chance of being used past the 30 day mark. In addition, only 20% of free apps are used on more than once.

Pinch Media, “Unless there’s something inherent about the app that screams free, sell it.”